Orgasming PLEASE HELP!!

Olive
I have never gotten off with any guy I have ever slept with but if I masterbate I get off just fine. Most of the guys I've been with have been pretty good in bed so I don't think that's the problem. It feels great I just can't get to the "point of no return". Is something wrong with me? Is there a way I can make myself orgasm during sex?? 
PLEASE HELP! I FEEL LIKE I'M WEIRD OR SOMETHING!