Help!

Okay so today the topic came up of cuming more than once, which my boyfriend hasn't during sex. We never go another round or anything. I tend to just lay there while he does all the work so he said it's because he's tired from doing everything. He says I'm the best and brightest he's been with. How can I do something? Idk what to do. Everything I do feels wrong. I can't find my confidence during sex..