Is is normal that my future ex husband doesn't want sex?

Yeah, because grown ups don't do sex.(?)
You stopped having sex months before the wedding and still got married?
What did he mean by "too tired"? Did he explain? Did you ask?

Sounds like a serious lack of communication to me.

I think that was a really big clue that your marriage wasn't going to work out!

Ladies can be on top to. Might have fixed that tired problem. I'm kinda lazy, but i'm always willing to do the old switcheroo and help him out lol

There's several possibilities.

1) He's cheating - which I normally don't say right off the bat but he's also accusing you of not being grown up for having sexual desire?

2) He has a medical issue

3) Stress - especially work-related stress

THE ROUTINE DOES KILL THE PLAY AND SEX
SPICE UP UR PLAY GROUND SEX, BE SPONATNIOUSE AND AVOID THE ROUTINE, BE SEXY AND SEDUCE HIM AGAIN.
BE SEXY, FEEL SEXY AND U GET WHAT DO U WANT.
SEBASTIAN

Unimportant said it all, I'm just commenting to back it up. I'm lame, but thats okay.

So many others have hit in on the head all I Can do is say that they did and there are a million reasons why he is tired, for one that is the age that men generally have that change over from teenage hormones to more adult levels and their sex drive levels out and in some cases goes down.

He might have meant in grow up , that hey I'm doen 12hr f'n days here and you still expect me to dance !
But seems it started before you got married , there's more to it.
To be honest I think he was already lacking interest by the time you got married and the fact that you've separated so soon well , he probably knew it but either couldn't quite understand it or hoped it would change.
But hey , not a very smart time to allow your weight to balloon up either and still o young , that'd pretty well be the icing on the cake and seal the deal I think .
One things for sure tho , he ain't into you anymore physically so your probably doing the right thing in separating but - that is unless there is something else like above there but eh - you gotta talk to find these things out.

Maybe it's you.

Maybe he's gay?

I personally would say it's normal. A lot of relationships once they become more comfortable forget about having sex. It no longer becomes a priority so maybe he saw the fact that you still thought it was more important than he did he thought you should be focusing on more important things? I think sex is so important in a relationship and you need to find ways of always making it a part of your relationship no matter how long it's been. My advice to females would be not to always give in whenever he wants it coz we all know they don't always go for it when we're in the mood. Don't make it something he controls and can get so easily. We should not be accessable whenever the time suits him. And though I know it's sad but I think for females to get the attention we need in a relationship we kinda have to get use to these "games" as it were. Sad face. But I think if you make it fun.. teasing and stuff and being confident about it like you're a sex goddess and not giving it up so when you do want to he jumps at it rather than saying "eh I had it last night"

Why would you follow through with a wedding if you already had the equivalent of a 40+ year marriage?

You aint attractive anymore with the extra 25 lbs you put on.

If it was a man complaining about this everyone would be jumping on him for daring to complain about this....just saying'

His wording makes me think he's lieing to cover something up. If children aren't supposed to have sex and grown ups aren't supposed to have sex then WHO THE FUCK IS?!?! Now i would study his activity. Perhaps he is having a bit of a crisis. Maybe he is finding himself less interested which may be something medical. Or what most people think and get scared of is that he may be getting his sexual "fix" somewhere else. If you trust him and truly care about him i would sit him down and talk about it. There may be something wrong and if he can tell you about it, things might change :) Just make yourself open to him. Let him know that if it's something he would like to talk about you love him and won't judge him for any problems he may be having. After all, women love to have support from their husbands :) why can't a man enjoy support from his wife?

Doesn't sound like he's that into you. Let him go, and find someone who is :-)

You knew this when you were engaged. Why not discuss it with him then? And why give up so easily on him?