Guys I'm scared, my friend is threatening to beat me up. He heard I'm trying to date his little sister and now he's lost his shit. Should I get the college involed? I didn't think he'd be this angry... I am legitimately scared for my safety he was furious.
Then there is literally nothing to do. No one you can get involved. Skip town, skip states, live life under a new name.
It's either get beat up (until you stop dating her)
Go to jail
Or kill the brother, and run off with the sister for a bit until you go to jail