What’s wrong with me??

So every time boyfriend and I have sex, he thinks he’s doing something wrong or not enough because I can’t seem to cum, or release or what ever, he says it’s because I’m not satisfied but I’m pretty sure I am, like i honestly don’t really know what to expect or how it’s suppose to feel because I’m still new at the whole intercourse thing, I’ve even tried master bating and it feels fine but I don’t get the whole cumming thing after, what wrong with me?