Ok so my(24F) boyfriend (29M) takes a while to finish. Sometimes I'll be doing something (either on top or a bj, or whatever) then switch it up because whatever muscles I'm using are getting tired. I'll learn after sex or right after I move that he was kind of close to finishing but the change wrecked it (my words, not his). When this happens I feel terrible and power through another way, but this adds even more time and by the end everything hurts. But I make sure he finishes.

I've never "lost" an orgasm with him. I either do or I don't. Whereas with him, if he loses it and I don't want to continue due to fatigue, that would be the end of sex. And I guess I feel bad about blue balling him in a way.

This doesn't happen a lot, but it's happened enough that I want to know what to do if it comes up.

So, WIBTA for not putting in the extra effort to make him finish after getting him close once?