I've seen it happen, it's happening to my friend right now. Before he was cool, me and him and another guy would hang around, chat, chill, talk and keep secerts, nowadays when he goes to parties alot more than I do, he ****gs me off, insults me to the point where I smack him in the face, he shuts up for 2 days, then starts again, who's ever had that happen to them, changes suck eh?