Is this abnormal/strange/unhealthy?

So I have a guy friend who I've liked for a long time, and I'm sure he feels the same even though he hasn't said it.

I don't know how this started, but we just like to wrestle and play-fight.

But we like to actually hit each other. I'm not saying we throw punches, but we'll definitely get into it to where we're rolling around the room, he'll throw me over a couch, and we're kinda hurting each other because of the way we play.

I mean, I do bruise rather easily, but when he grabs my arms really hard sometimes it leaves marks. I know it SOUNDS really bad, but I guess we have sadomasochistic tendencies.. but not sexually haha.

It's like Fight Club, but not to that extent because we're just messing around and we don't draw blood or anything too bad.

I know a lot of people don't understand the mentality those who find fun in pain, but I mean, is this normal?

Does anyone else like to roughhouse?

This isn't the only thing we do. We have a normal friendship that is taking its natural course. We just happen to enjoy periodically getting into brawls.

Good or bad? What does this say about us? Him? He's a really good person. He would never ACTUALLY hit me. We're just playing really rough!