Sounds like an ENTP to me actually - they have this thing going, where they believe that if they are persistent in pursuing someone, they'll come around to them eventually. I personally think INFJs have too much pride to go chasing after a friend that doesn't want them around. I know personally for me, when I get even the slightest feeling that someone doesnt want me there, I retreat into my shell. bye bye. It's when you said "Shakespearean acts of revenge on the level of Othello," I thought "ENTP." We had an ENTP in here before, whose username was really dramatic, and he was talking about a) he fucked up in some friendship b) there was a no contact rule established by the school and c) how he tried to get around direct contact by contacting all of that person's friends .