I will try to keep this PG.

I too am a heavy set person.  I have NEVER had a guy make nasty, rude or disrespectful comments about the way I look when we were intimate.  Men are visual and enjoy watching a womans body move.  If you are enjoying the intimate moments, chances are he is enjoying it knowing he is pleasing you.  There are many things you can do besides sexual intercourse and wondering which position you want.  There is of course oral but also toys for both of you.  My likes will be different that yours.  Don't be afraid to experiment.  Trying new things can bring you two closer together because its something for just the two of you.

Most important, the time you two share before and after is just as important as the moment.  Sex is an exploration, much like conversation.  You'll find each others likes and dislikes; wants and needs.  It is meant to bring you closer together.

i played football my whole highschool career, and i was a big guy all my life. i'm six three, and i'm normally anywhere from 230 to 250, but my girlfriend and i have a very active sex life. just because you're big, doesn't mean you can't have great sex. :D

i myself have always been very scared about getting undressed and having sex with another person becasue i was always self conscious. Then someone introduced me to something called self confidence. when you have confidence nothing else matters, you know uyour pretty and if anyone else especially that significant other is going to try to tell you otherwise you dont need them. Even after gaining self confidence however i was afraid of being on top, thinking he wouldnt be able to breathe or something so i was always on the bottom and it got extra boring after a while. then i found the one i mean the one i will spend the rest of my life with. WHen you find that person they will help you out and tell you what to do if your scared and will be ok if he gets a little squished. I being heavyset thought i wasnt going to be able to do  the whole knees up to your head position for deep penetration but with a little encouragement and help from my partner i can do it and it feels amazing. personally my new favorite is cowgirl (girl on top) and an easy way of knowing your not going to crush him is after he has inserted himself in you to lean over his body so that you can kiss him and put your hands on the bed in front of you above his shoulders, much like he does when he gets you missonary. and ride him like that, kissing him while doing this will make him forget about any preasure if he feels any at all. Its all pretty much in the way you carry yourself. If you think god i cant do that then your body wont let you, if you say yea im going to do that then your body will eitehr be able to do it or get close to it. Its about relaxing and just going with it, and if something doesnt work the way you want it to dont let it get you down go on to the next position and keep going. All you need to do is find your inner sex goddess and let your body do the talking and believing in yourself. Good luck. i hope i helped