He's so perfect, and I feel too self-concious for intimacy!

I am overweight by about 30lbs, so I do have some extra "baggage". Anyway, most likely, this weight isn't going any where, because I've tried many times, and failed many times. So the problem is, my boyfriend and I have been dating for some time now, and he really is wanting to have sex (and it's not just him, I do too)....