Is this abusive?

My father has always teased me but lately he's gotten a lot worse. It's borderline bullying to the point where he made fun of me because I didn't finish high school (getting a ged) in front of my friends. I'm so tired of his comments and my grandma who lives with us does the exact same thing. This has been constant, even more so that my mom has put him in charge of teaching me to drive. I thought my mom was my soft landing but she tells me I'm crazy and that I'm just taking him too hard and blames me for when he gets in a bad mood for something I said back to him. I hate myself so much now. I can't take it. I have no idea what to do. I want out of this house but I'm only 17 I'm stuck. Please assure me I'm not crazy.