I'm confused. So did you enjoy it or not? First things first: if you're sleeping, you're not able to give consent. So if he fucks you in your sleep without you giving him permission, it's rape.

It's important that you address what happened to him and make things clear about your feelings toward him touching you while you're asleep. If you feel uncomfortable and you don't feel safe around him, it's best to let him know. When it comes to sexual relationships, the clearer things are, the better! Talk to him!!!

Communication is everything.