Man the fuck up and fight this kid. Why? I'll tell you why.
1). You don't make out with a man's girlfriend if you don't want to fight him. .
2). If you step up and beat his ass, you will be a legend among scrawny fuckers everywhere.
3). If he kicks your ass, it's because he's a foot taller than you... and now this girl is completely disgusted with him and can't wait to let you pee in her butt and brush her teeth with your penis daily to make up for getting your ass kicked for taking to her.
You literally can't lose. Well, except for getting your ass kicked- which pretty much happens when you fuck around with peoples' girls who are liek way more huger than you, so you sort of deserve it anyways to be honest. So yeah, you want to be a player and pull quick ones, plan on fighting people. Just aim for the chin, brah. Good luck!