So, completely hypothetically... let's say this guy and girl are best friends currently who used to date, and are also **** buddies, and they go to this party with this other guy that has already been previously hated by the first guy. This irrational hatred is due to the second guy (hereafter referred to as "dick") and the girl going to a party months ago with the main guy, and it ending up being them getting drunk and him feeling her up. Not really that big of a deal, but it bothered the guy extremely and still does to this day. So, now there's this other party, that the guy, girl, and dick end up going to together. The night is going great, though the guy has fears that the night will end up the same way it did last time. As everyone is going to sleep, they're all over each other, drunken and he's basically feeling her up again (the dick), so the guy gets an overwhelming feeling of jealousy and after unsuccessfully trying to get them apart and looking like an idiot, runs away from the party and doesn't come back till morning. QUESTION IS, IN THIS TOTALLY HYPOTHETICAL SITUATION, IS IT COMPLETELY IRRATIONAL FOR THE GUY TO HAVE EXTREME JEALOUSY TOWARD THE GIRL AND THE DICK That applies to both times too, the party months ago and the much more recent one. Is he justified in feeling hardcore jealous (considering the fact that the guy and girl are best friend **** buddies), or is the jealousy completely unjustified? Also, just because he got/gets extremely jealous of that kind of thing doesn't HAVE to mean he has romantic feelings for her, right?