Sex Hurts??

Hey guys if you could help that would be great! I’m 18 and with a guy at the moment. He’s average sized but every time we have sex it ends up feeling like there’s loads of little cuts down there and just ends up stinging so then I don’t get wet anymore and so on you know the drill.... basically does anyone else get this and how do you guys deal with it?

Ps: when we have sex it feels so good man I don’t understand why it’s hurting he’s super good at foreplay and knows exactly how to get me started so I’m very confused?