Help!

So I recently started university and me and this guy clicked from the jump and we became good friends.

We talk everyday and have established a good friendship.

However, recently things have become more romantic between us. We flirt which we never used to do before and last night he came over to my room to chill.

We were really close and touchy-feely with one another and he was giving me massages and playing with my bum.

We couldn’t keep our hands of each other and I am attracted to him but I held myself back because I don’t know if I want to cross that line because we are good friends and us having sex might ruin that.

What should I do because he’s coming over again today?😂