Guys finishing

So I just lost my viginity to a guy I've hung out with a couple times. We've Hooked up twice now and both times he hasn't finished. We've gone for like 25ish minutes both times but like no matter what he doesn't finish. He says he lasts long but now I'm worried he won't want to do anything anymore since he said I'm the first inexperienced girl he's slept with and all the other times he's finished. So I guess I'm looking or advice /what should I do?