Is it selfish that I want to finish too?

I, 21F, and my boyfriend, 23M, have been together for over 2 years now. We started engaging in sexual activities around 6 months into our relationship and do so on a regular basis. But, it seems more focused on his pleasure. He always finishes and when he does he’ll go to the bathroom, clean up then put on a movie or scroll on his phone. I’m always left thinking if that’s how it’s supposed to be? Everytime I get quite upset (and i admit I have cried a few times) because I feel left out, I’ve told him the reason why I get upset before, but he just doesn’t understand or immediately resorts to “i’m a bad boyfriend” and then I have to console him. I have never finished myself and from hearing my friends experiences it makes me feel even more excluded. I don’t know if there’s a problem with me or if I just don’t enjoy it as much as they do. Thank you for any advice <3