So, last night I went out. Got 5 numbers, danced, kissed some girls and I was just about to leave when I saw one last girl I wanted to talk to. I went to her, started talking and just when I was about to finish my first sentence (yeah just 5 seconds talking to her), a guy came in front of me and said that I should stop talk to her or else we were going to fight (but then in a pretty intimidating way

). Now, I have been in other moments like these and after he said that, I was totally amoging that guy, even with his friends who were totally cool, but he kept saying that he wanted to fight me (Btw she had a boyfriend, but it was not him) and when I was about to leave he kicked me against my legs. But the problem is; that everytime someone threatens me or attacks me physically, I kinda want to hurt him... badly... Now, I don't want to murder him, but I really, really want to hurt him badly.
So, got any advice, tips, how you handle situations like these?