I think I'm in abusive relationship and want to get out?

I'm 21 yr old girl and I have 20 yr old ex girlfriend from high school we both are deaf (I'm bi but going to be straight again) I let her move in with me in my apt 8 months ago cause i felt bad for her for being on verge of homelessness when her apt lease was over and she's poor. Right away after she moved in she told me I can't see or contact my ex boyfriend due to fear that I'll leave her and go back to him which I wasn't planning to do. She looked in my cell phone texts, checked out my facebook & internet history and ask me questions what I was doing when she's gone working. She also delete people she doesn't like off my facebook when I'm not looking and numbers off my phone. I was so depressed I slept with one of my guy friends who I have crush on and told her (she even encouraged me to do so cause she knew I'm not meant to be with girl and I can have a boyfriend), she got pis$ed off and looked up online for complete stranger to sleep with and she did then never contact him ever again. She kept that as secret for a month then told me on the day she threatened to break up with me, and I said sure go on break up then she got super upset. (she expected me to feel bad and beg not to break up but actually i want to break up the whole time but couldn't tell her) Also I was deeply hurt that she slept with a complete stranger in my house while I'm gone at work few blocks away. After that I decided to be committed to her and to make this relationship to work out so I can handle living with her until my lease is over a year later then I'll leave her. Every week things just got worse and I stopped eating and taking care of myself and cleaning my apt due to constant anxiety and worries about her. I'm not allowed to go out some days to see friends earlier but allows if she feels like it. So far she encourages me to go out with friends and visit my mom cause I complained of being too lonely, I was doubtful that if its a set up but did so. Always when I come home she will ask me what i was doing and yell at me right away or few days later and accuse me of having with my guy friends or "cry to my mommy about how bad she was" or backstab to friends about her. I did tattle to my mom and few friends to make myself feel better but I never had with anyone else for 8 months I don't even want to. She started to withhold my car keys and phone or block door when I want to go out to escape her. Started to shove my head and shoulder often and once choked me cause I threw crumpled paper at her face. I shove back and once beat on door with fists if i'm frustrated at her so I'm violent too. Few days ago she felt so guilty that I'm being listless and begged me to punch her shoulders so I did and she cried cause it hurts then walked away without plotting a revenge on me. I didnt get it why she let me to do it? But it made me feel better. If I'm sad she will blame herself then get mad I have no idea why! Why mad at me when I'm sad? She caused me to be sad and then get mad at me for it huh? Anyway, I told her to get outta my home she refused cause her name's on lease and she got keys. "Nope my name's on lease so here is my home too u cant do anything. Go on call cops they cant do anything cause u got no proof and I can file false allegations by u. U cant tell me what to do!" thats what she will say! I'm so tired of her I'm so ready to kick her outta here. I cant stand one more stupid challenging walk-up to my face of hers I hate her! Why is she like that even though I helped her alot and gave her rides? How can I kick her out with ease? It's likely she will live on street if i do so and I will feel bad and its my fault