Can anyone relate? Can I please get some advice?

My bf has never really been the most adventurous when it come to the bedroom, he knows what he likes and he sticks with it. On special occasions I’ve gotten him to loosen up and try new things, but recently I’ve been feeling really neglected in the bedroom. I’ve tried to express how I feel to him, but he just takes it as me nagging which isn’t at all how I approach it. When it comes to sex or romance I’m always the one starting everything off, it doesn’t even seem like he wants to touch me. Then I get upset because it’s so selfish of him to never want to make me feel good, during sex he doesn’t even look at me anymore.... I ask him why he’s acting like that and he insists he’s tired. I don’t know what to do anymore :/ he makes me feel so ugly because I don’t feel like he cares or wants to please me or make me feel good. Am I being selfish and bitchy?