boyfriend said I'm too bossy 🤔

Lately when we have sex, my boyfriend has become really lazy and doesn't do much. So I've been asking him to do minor things that help make more comfortable, since I'm 27 weeks and my belly is getting bigger. I'll say simple things like "stand up, don't lean forward on me," or "grab my hips tighter please," and he gets soft and just stops trying to have sex because I have "too many demands." It's so annoying because I'm just trying to communicate and make it comfortable for me, and he just wants to be lazy and worry about his needs. I'm getting so frustrated. This has happened the last 3 times we've had sex, and it's making me not wanna even have sex anymore.