friend of mine in college met a kid through one of his girlfriends.. the kid wound up tagging along with my friend one afternoon when my buddy was coming up to the room for some weed smoking. our room being a central hangout for bunches of people.
somehow he got the impression that we were instant friends and that we all wanted him to be around 24/7. guy would show up at any time of day or night, knocking at the door trying to attach himself to whatever we were doing.
we figured out on the first day that he was
off. on day 2 when we tried to split to dinner without him grabbing on to our shirt-tails he said "i've never seen you guys act like this before.. you're usually so cool".
we made it clear to him that we were not his friends, that his behavior went past just strange and that it was in his best interest to stop coming by our room. but he persisted like a kicked puppy. he would show up in the dining hall. at parties. at bars we were at. at the basketball court, etc.
took us weeks to shake this kid. nothing worked. ignoring him didn't work. telling him to beat it didn't work. actually fleeing the scene when we saw him didn't get the point across.
the only way we were finally able to lose the kid was because he somehow attached himself like a remora to another group of people. he found a common interest and moved on to suck the life out of their crew.