A friend who takes advantage of me?

I have this friend. First .. We worked in a group for a uni assignment. She made me do the whole thing and got the same mark. She does small things deliberately to piss me off- like turns the heater up really high in the car, puts it on a song that she knows I hate, winds the window down when It's freezing. I'm not being paranoid.. She literally told me she does it to teach me a lesson or piss me off. She pretends to have no social skills- makes really racist and inappropriate jokes. For example, something bad happened with my dad (horrible and unusual situation), and now she calls him my "domestic abuse daddy." She invites people to my house.. It's study break at uni and she organised this whole party. Then she didn't turn up and I was left to entertain. I didn't even want these people over to begin with. Just wanted to study myself. Then sends me this abusive text message blaming me for everything. Yesterday did her a favour and handed in her assignment. No thank you. I have a lot of stress at home and personal issues and I feel like I can't deal with her anymore. Unfortunately she's in my social circle. What should I do?