call him out in public...people just have different levels of humility. By steppin git up and reaching his you are not being mean...you are actually accomodating him
If he's psycho he won't stay away whatever you do.. I don't know, give him a poisoned apple, blame pesticides I had stalkers.. I killed them all.... good ridance ok more seriously, just throw a flower pot on his head while trying to climb up your window to spy on you
I'm sorry he might just not be aware that his behavior is abnormal, he can't face reality, he can't move on, it's difficult, makes him do crazy things.. just don't tell him he's obsessed or stalking you.. it will hurt him because he might not realize it.. the meaner you'll be about this, the harder it'll be to "get rid of him". Just wait.. he'll realize it.. and if he's REALLY psycho then kill him, use my advice it's hard to step back into life when it's been changed so dramatically, trust me, I know, and sometimes.. you just gotta wear a mask and pretend everything's okay..