Is it normal that my gf is still friends with her ex's best friend

Dude what are you doing?!
you are literally making this guy, and his friend, the Ex, the center of your relationship!!
it's been more than 2 years since you posted, but I want to replay in case someone else comes up with similar problem.
DO NOT MAKE SOMEONE ELSE, ESPECIALLY EX, THE CENTER OF YOUR RELATIONSHIP!
instead of focusing on that, have some self confidence... if you can't make your gf desire the relationship, barging her or more accurately forcing her into staying won't help nothing. it will only waste the time of both of you, and if you get married this way, you WILL, as a fact, get divorced.
focus on being a good boyfriend, leading but kind (remember these two words!), for example plan things in your head, and don't share, come up to her and be like "tomorrow night at 7 be ready to go out, wear casual with little makeup" (tell her what to wear is important because she doesn't know how to dress for it, and you know woman... also what to wear and when, is leading her, not in an assholy way, but fun and mysterious) "where are we going?" "you'll find out..." then take her on a dinner, then to park, then somewhere else, never tell her what's next, because you say when night is over! in a very kind and fun way (don't be hard ass, if she feeling sick post your secret plans for another day, that's the beauty of secret plans) make it fun, mysterious, and most important adventurous... the FEELINGS that she remembers from you can be easily higher than any desire/feeling she builds for anyone else! why?? because you are the one that currently can touch her, can take her places, you are in a huge advantage, you are THE BOYFRIEND (sounds like a superhero). if someone who isn't the boyfriend manage to make her feel more, outside of relationship, what do you think will happen? don't over think stuff, like "i don't know how to make her feel.... i can't, i will lose" just chill bro... you can't lose as long as you focus your relationship on you two.
for the 100 time I'm repeating, don't make your relationship about another guy.
she's friends with a guy? why should you care? she loves you, she has the feeling of euphoria in memories of you, why the hell will she fuck someone else??? forcing her into not talking to someone will only increase her desire to do so, and what do you think that will result? more desire literally, even if it wasn't there before.
gf hangs the phone and tells you "I talked to *guy* and he told me that there's a sale blah blah"
you replay??? NOT ABOUT THAT! you can say "ok"/"cool..." but after it add something else immediately, example "ok, what do you say, large popcorn for both of us or each small?" bam! subject about you two, in the phone she was somewhere else, now she is talking to you, what are you talking about? YOU TWO!
you don't care even if her ex is trying to get in her pants every weekend.
why? because you are a leading male and don't think, know, that your female desire you. she will tell you if it's getting physical, she will want you to know, and protect her... then call the police or smack down the bitch if you want to do it yourself, because there is nothing lower than a guy hitting on someone's gf while knowing.
if she does cheat, that's on her, I'm sorry but as much as I love her if she's fucked up enough to cheat at this level of relationship, she's out, no questions, she will come back on 4 to feel that relationship one more time.
believe me, if you have these emotional adventurous epic memories in her head, that you created about your relationship, she will never forget, she will always want.
if you REALLY love her, then drag this brake up few weeks, have fun, don't need to date anyone else for that, just have fun alone, with friends, whatever, and after she had it sink in, that thought that she HAD amazing relationship, and she lost it for something stupid, that sad "I lost it forever now" cry her heart out about it, you can even go to her yourself (even though most likely she will pop up for the 10th time) and tell her "truth that I miss you... what you did hurt me so much, why?" she will blah blah things, and you'll be in, leading, kind, and have her do so much for you just to cover her guilt.

sorry if it's too long, I wanted to roll it round and round to make it sink in.
long point short: Forget anyone else, you do your part! focus on being a good boyfriend, and make your relationship about that. good boyfriend = leading, but very nice about it. the rest is on her, and not for you to control.

At least she isnt friends with her ex still. Look at the bright side.

*so they*

Oh and you keep saying marriage and wife, they are not married and it says 'planning on getting engaged' Southey are not even engaged yet...

Silykitty55, you say no one stays friends with the ex bf? That's totally not true! You also say that the only reason one would do so is for a booty call...also totally not true! I'm friends with nearly all my ex boyfriends and it's strictly friendship! And I'm also still friends with some of my ex's bestfriends and friends. Just because a sexual relationship doesn't work out with someone doesn't mean you can't be friends on another level. If he on the other hand has a problem with it then he needs to sort it out and talk to her about it. If she doesn't listen to him or understand what he is trying to say or doesn't care then he deserves better and in my opinion needs to move on

man up and tell the other dude to back the f off.
He needs to respect you and your wife as a couple.
That is so disrespectful for an x to keep talking to a woman who is engaged to be married. I am a 26 yr old single mother. When I was married and unhappy, I began making myself available a month before I moved out and left him. I started talking to 2 different guys, and dated a 3rd guy months before.

You need to sit down and talk to your wife.
I truly think that if your wife hs enough sense,respect for you and herself as a married couple, she will stop talking to this x bf whom she claims they are good friends.

nobody does this.)stays buddies with their x's or x bf's best friend(s).
The only reason why an x bf or x gf would stay friends is to hook up and be a booty call to one another.
normal people don't do what your wife is doing.
It wasn't right when I began dating other men while i was married(even though I was planning my leave in advance)

I wish you the best of luck.
I think if she doesn't stop talking to her x or his best friend....you need to find a real woman who has respect for you and herself as a married couple.

Oh and btw, killing either or both of them isn't a good idea lol

I still can't do it, it crashes every time. In short, I told him to talk to her about it and I mean really talk to her. In my opinion he shouldn't be with her but that's my opinion and his relationship is none of my business unless he asks for my help or opinion.

It's wierd but it let's me do these comments but not the one I had to copy an paste when it crashed the first 2 times

I'll keep trying. Sorry

Every time I commentto you now it's crashes this site?

Its clear to me what you have to do. Kill them, starting with your GF's friend, and then kill the ex boyfriend as well.

Its your only option as far as I can see.

How old is she by the way?

Well with the extra info you have just shared I would have to slightly change my answer although I still stand by my earlier comment about jealousy. If she won't talk to him with you being in the room then I would be concerned. I wouldn't hesitate in letting my boyfriend meet or even hang out with my ex's that I'm still friends with and if she wouldn't be all willing to let you be friends with your ex's then that's a big problem in my book. You said she said that guys can't be friends like that because there always sex involved (forgive me if I'm wrong, I'm on my phone and can't see your comments until I post) then what does she think her ex is thinking or wanting from her? Double standards should be illegal and something that really annoys me!! Time for you to meet him or have a talk to her about it. Don't go off though, that will only make her angry but try make her see it from your point of view. Make her imagine what it's like for you and ask her how she would feel if the situation was reversed. Hopefully she will understand. I actually have a good male friend whose girlfriend is doing exactly what yours is doing to you.If she won't let you be friends with whomever you want then why does she get to?

Jealousy will ruin your relationship. Just because she is still friends with him doesn't mean there is anything untoward happening. Get rid of the jealousy or it will be that that breaks you up, not the friendships she has. I'm still friends with most of y ex boyfriends and their friends and can and do see them for catch up beers and dinner and my bf doesn't say anything because he knows that jealousy will make me leave him. Same with him though, if he wants to be friends with whomever he pleases then that's his choice. Whatever happens happens and if he chooses to go back to a past relationship while being with me then so be it. I'm 100% when I say that your jealousy will be the thing that scares her away

Let this guy know hes intruding on your relationship. I don't understand they're friends... but do they still see each other occasionally or something or just chat through the phone? Its really strange she's definitely trying to keep doors open that would really unnerve me also.

Thanks for the votes everyone... Could you please tell me what i should do though ?