When he doesn’t cum

Does anyone else get self conscious when he doesn’t cum? This is something I’m really struggling with, I don’t know why I get so fixated on making sure he cums and if he doesn’t I feel like I am not good enough to satisfy him.

I hooked up with a guy this weekend and he told me it was hard for him to cum and that he had high resistance. We had sex 4 times and we fell asleep, he implied he came and the other day he admitted to me that he didn’t cum.

Any thoughts about this? Are all guys just a little different and am I being too dramatic by associating it with my self esteem? No idea why it’s bothering me so much!