Is it normal for a partner to talk to their ex

Hmm, nope. Only reason an ex shud be in the picture is if there are kiddos in the picture, even then conversations shud be kept strickly about the kiddos... ;)

have you explained VERY CLEARLY that you are not happy with it? if so than No its not ok. If u pretend ur cool with it then he may not see the problem. But it would bother most ppl

It sounds like he's still involved with his ex, if not physically, then definitely emotionally. If he doesn't understand this situation is not appropriate then you should make the decision for him and move on.

Hey, are you dating my friend dan? XD sounds a lot like him, lawl

Nope...not ok...it's a big slap in the face if u ask me

Not okay in any circumstance.

Not cool. That would drive me crazy!!! It's one thing if u guys talk about everything and he talks to her only every once in a while, but not the other way around! Maybe it would be good to tell him how it makes u feel, and that it's important to u to have healthy communication with him. I would say it in a loving way though, and without putting blame on him. U know, like, "I feel ___ when___...", instead of, "you always____"

This is ridiculous. It's normal to sometimes stay friends with your ex, but him and her aren't in a relationship anymore. It's now time for him to start consulting with you too. You have just as much of a right to know about his problems as she does. You're the one in a relationship with him. One of the main thing's you do when you're in a relationship with somebody is share personal thing's with them. It helps the relationship to grow. If he's sharing all his problems with her, how will you ever know? You won't. And by him talking with her about his personal problems, is the one thing that's keeping them closer.

I think you should straight up tell him that Michelle isn't his girlfriend anymore, and that he needs to start opening more up to you. You feel pushed to the side. After all, you are his CURRENT girlfriend.

I think it all depends on his situation with his ex, how long they were together, if kids were involved, how they ended etc. Although I have never done it some people can stay friends with their ex, very good friends infact.
He really needs to approach you first about advice etc before going to anyone else, especially his ex. I think you need to stress how uncomfortable it makes you feel. It sounds like quite a new relationship to me so maybe give it time and he'll feel comfortable enough to come to your first.

Not ok...

Has he tried coming to you before about something and you blew it off? That might make him turn to someone else.
Also...maybe he just feels more comfortable talking to her if she knows him better or longer than you have.

NOT OKAY. Beat the crap out of that bitch Michelle. She's the diabetes in your relationship.