Can you guys help me out?

Meg
Me and my boyfriend have been together for 4 months now, we've had sex more times than I can remember but last night as we started getting freaky after about 3 minutes he came. 
He got really upset about it and told me he was really embarrassed and that he doesn't know why but with me he can't help cumming so quick and that he's never came that quick with any other girls. 
Am I doing something wrong to make him cum so quick? How comes our sex is only lasting a few minutes when he's been able to hold out longer with other girls?😩😩