OP here. I couldn't figure out how to respond without making an account, so I made one in order to reply to a couple of people. First, thanks to all the people who expressed concern. To the people who said YDI, I say screw you, because I did nothing to provoke this asshole. Yeah, I'm underage. I don't look underage, but I definitely am, braces and everything. My mom's boyfriend is yet another guy who's a worthless piece of shit, she has no taste when it comes to men. I talked to her about him after he left and she rolled her eyes and said it was "a joke". Which apparently I didn't get, because I'm "uptight". Moving in with my dad isn't an option, he's on the other side of the country and really can't handle having another person living with him right now. I do miss him, but frankly he's not a whole lot of help, my parents hate each other and while my father means well he's more irresponsible than my mom. I'm hoping my mother will ditch this guy once she gets bored with him, like she has all the other times. This type of boyfriend is nothing new, this is just the first time one of them has gotten somewhat physical with me. Yes, it creeped me out, yes, he's a disgusting human being, and yes, I have a lock on my bedroom door. This is not the first time I've locked myself in my room when my mom has brought home a guy. It's happened before, and will likely keep happening until I move out. Thanks again to the people who expressed sympathy and concern. Just thought you guys ought to have a bit of context.