I just turned 23 and my fiance' is 24 going on 25. We have been together for only 7 months and been engaged for 3 months. The relationship is going pretty fast but it all felt so right. Lately we haven't been having sex and it's driving me crazy. I ask him about it and he says he's just too tired or he doesn't want to do all the work. ( I cannot be on top)
I try going down on him, I try sexy lingerie I try foreplay and nothing seems to EVER get him in the mood anymore... help

You said you "can't be on top". Do you have a medical condition? I mean, he feels like he is doing All the work, and you aren't helping.
There are LOTS of positions that you can do to make him feel like you are doing some of the work.
If there is NO sex, you need some couples therapy BEFORE you marry.

I just turned 23 and my fiance' is 24 going on 25. We have been together for only 7 months and been engaged for 3 months. The relationship is going pretty fast but it all felt so right. Lately we haven't been having sex and it's driving me crazy. I ask him about it and he says he's just too tired or he doesn't want to do all the work. ( I cannot be on top)I try going down on him, I try sexy lingerie I try foreplay and nothing seems to EVER get him in the mood anymore...help

Can you explain why not?

I had broken my pelvis a couple years ago and It stiffens up a lot when I am on my knees or putting much weight on it at all

What about side to side positions?
It will be the most enjoyable to him, if he doesn't feel the pressure of doing all the work. That is a huge turn-off, even for me, if I am remotely tired.
Once in awhile wanting to work is a great thing, but if it was every time, the pressure would bother me.
Look up some positions that look less painful and more interactive as I imagine that a stiffening up pelvis affects a lot of different positions. Print the pic off the PC and tell him you would like to try that tonight. He will get the unsuttle hint.

You could even ask your doctor what positions would be best, as embarrassing as it sounds it would be worth it. You're definitely going to want to get this worked out before the wedding. Postpone it if you have to because this situation could really ruin a relationship

You know... maybe its going too fast and he is starting to realize that...

In my mind getting engaged at 4 months really is rushing it WAY too fast. It might be as simple as that.

Good opinions... carry on

Like Smoothy said I was just about to say the same thing. He realized that he was moving too fast and though you might feel the same as you've always felt he is no longer interested in the commitment.