Boyfriend Doesn't Enjoy Sex?

Okay a bit weird, but I recently started having sex with my 5-year boyfriend. It was both our first times. I always had a hard time cumming (I actually only did it once), and he sometimes would finish in 3min or less when we did sexual stuff. Weirdly enough, lately he said that sex is whatever for him, because it doesn't feel good for him. We've tried many positions and still nothing. Even in other situations (hand jobs, blow jobs, wtv), he just seems like he's extremely bored and not feeling anything. I don't know what to do, it's bringing me really down. I'm a girl whose arousal comes almost exclusively from feeling desired so you can only imagine how much this is affecting me. Please help