<human>: So I go to college and there's this guy. (its probably pertinent to mention that im also a guy) So this guy, we'll call him Dave. So I met Dave through a mutual acquaintance like once, last year. About 2 weeks ago he ran into me and started talking to me. I didn't quite realize he was a weirdo just yet. So I talked to him for about 3 days before I started to figure it out. He started waiting for me outside my classes. Before and after.   
So I also have a friend who I usually smoke with before my first class on Tuesday's and Thursday's. But since Dave waits outside for me, and I come in the back door of the building. We can't. Today, he happened to find me despite my best efforts. He started tellin me this story about how he was talking to these girls. He went outside with them to try and bum a cigarette (did I mention that he doesn't buy his own. Ever. He just bums them off me). So he went out with them and some guy told him to come over there so he could talk. So stranger tells Dave to stop following his friends. Dave gets angry. He tells me he was about to beat this guys face in, but campus PD was right there.  
So I'm sitting there, listening to him. And I really want to say "well you do kind of follow people around" until of course he gets to describing just how he was going to rearrange his face. This guy is bigger than me. By about 75-100 lbs. violence is my very last resort, but I'm afraid that if I tell this guy to stop following me, he'll get upset. I'm also not sure without telling him to go away I can go to campus PD. So what do you think I should do?

Give me the gist of the text in a nutshell
<bot>: have a stalker, he's too scary to tell to go away. Can't go to campus PD and complain without first telling him to go away and him not listening. Help?