Idk what I should do

Monique

So I’ve been seeing this guy for a few months. He’s 18 and I’m 16. We can’t actually date or go public bc we don’t want him to get in trouble. He accidentally left a hickey on my neck in plain crow and my dad saw it. He noticed right before he was going to drive me to school, with my friend who had spent the night. He pushed me into the bathroom and started yelling at me and calling me a sl** and a wh***. He didn’t believe me when I told him I’ve only been with one guy lately then proceeded to tell me that some 50 year old man walked up to him at the store a day prior and told him I had been doing sexual favors for all the guys at my school for money. I tried to tell him it wasn’t true and he didn’t believe me. I didn’t even know this rumor had been going around. So I started asking ppl if they’ve heard anything like this and the all said no. So some guy I don’t even know just ruined everything I just rebuilt with my father. And the hickey on my neck made it hard to believe. So now I’m not allowed to go to my prom this weekend and I’m actually really upset bc it was going to be the one time me and this boy were going to be able to be seen together in a public place. I’ve been debating moving in with my mom instead as not to deal with my dads rudeness but it’s a really big step and idk what to do... Thoughts anyone?