Is it me or him?

Pamm • Idk how I would live life without glow

So my boyfriend and I stopped having sex a couple months ago and when we do have sex he never finishes. He use to finish all the time and we would have so much fun having sex. He started taking new bipolar medication and he thinks that’s why he doesn’t finish but I’m not sure. He finishes if he jacks his self off but just not with me and it makes me feel super insecure because if it is his meds why can he finish himself but not with me?

It makes me feel insecure and like I’m not attractive enough. Any thoughts on why he can’t finish with me but he can himself?