What should I do? Advice needed please.

So to this present day I'm still living with my mother. I'm 20, I'm currently here because I'm saving enough money for school. But it's beginning to be too much. In June of this year I'll be 21. I feel like time is running out for myself to complete my goals. Now here is the real reason why I'm completely lost as to what I should do. My mom and I NEVER seen eye to eye. She's a big cloud of negativity and I'm a positive gem. The past week has been downright horrible. She has to borrow my vehicle since hers was in the shop. For the last three days of her going to work she has been possessive of my car. I haven't been able to pay my bill at the bank and its RISEN since I got my statement in the mail. She wanted me to drive to the store and she wouldn't give me my keys, so her bright idea was to throw them at me hitting another car. I could be talking about getting this item I've been wanting forever and she'd be yelling up a storm about how poor I am and I'll never have money to buy it. Leaving me feeling insulted and down in the dumps. Like who tells their own flesh and blood that they won't be successful or being this immature? Yesterday we had ice and bad rain. I was in my vehicle waiting for it to defrost and got spammed on my phone with calls and vulgar text messages.. To complete this craziness she pulled the window blinds up and started screaming and banging on the window to come add money on her card. Sometimes I'm scared to the point I'm questioning if my mother is human, lol. But seriously. This is unacceptable behavior.

My friend and her husband said they'd welcome me to their guest bedroom but that means I'll have to look for another job. My grandparents cannot have me since my grandma's sister comes to visit and takes the guest room. As much as I try to have a positive outlook on things, I suffer from depression and anxiety. Which has become a hassle since I feel like my mother is the main root of my emotions. I've been one year and a half clean from pills and I'd hate for one thing to trigger me to do that again.

I'm really sorry this post has gotten so long but I'd appreciate it if anyone has anything to say, whether it be your advice or your thoughts. Thank you.