Does your bf have trouble cumming sometimes?

Last night my bf and I had sex for the first time in over a month.. we went for 30-an hour and he never came. He finally just stopped and cuddled up to me and I started crying bc I was embarrassed.

He told me it happens to guys sometimes and it felt really good but it just wouldnt come out?

I just dont understand because it had been well over a month so wouldnt he have came really fast?😔

(I know for a fact he hasnt been sleeping with any other girls so that's definitely out of the question)