I was hoping someone has been in a similar situation and could give me advice... he seems very upset about this (and he is usually the happiest person I know).

My boyfriend has always been able to come when we have sex and during everything else. Once a few weeks ago, when we were having sex, he didn't think he could but eventually he did. Then last week, we were having sex and stopped since he felt weird and sick. The next day, we tried having sex again but he felt like he couldn't come and couldn't do it (despite being hard and turned on when we started). I think he was just worrying that he wouldn't be able to come. He says there isn't anything else going on except that now he is worried that it has happened a few times and he kept thinking about it.

Is there anything I can do to help? I'll try not to act like it is a big deal or anything if it happens again, etc. But is this just a "him thinking about it too much" thing and psyching himself out? Has this ever happened to anyone with a partner and how long did it take for him to get over it? He says he wants to wait a little while now before trying again... but I'm just worried that when we do, this will just be hanging over us and it might happen again. I just don't know how to approach it.

If it matters, we're in our early twenties and we've been together for almost two years.