Life and emotional abuse?

1st off, please don't ask my age. So I have a lot on my plate.my mother passed in 2014 and I've recovered a lot and I'm currently being "taken care of" by my grandmother and uncle. My grandmother verbally abuses me and my uncle has never had a child so he does not know how to parent. I'm trying to lose weight for myself after eating my feelings away for about 1 and a half years. My math final is tomorrow and I'm not feeling good about that. Personally, I feel like I'm in the wrong crowd no matter where I go and that's not far. I have a girlfriend that my grandmother and uncle do not know about because they are just too annoying you could say. Me and my girlfriend are LDR and we haven't talked since wensday and I'm not sure why. All of my friends are online friends and I have no real life friends that I actually see face to face. I am not going to call the services because I don't want to possibly go into the system then possibly go into a bad home. Can somebody please give me advice?