We will call my roommate Lucy

Lucy and I both went to high school together and worked together for a few years. We didn’t become good friends until after we graduated. For about 5-6 months we started to hang out a lot and considered each other “best friends” since neither of us had many friends at the time. She came up with the idea of living together and I thought it was a great idea. Once we moved in together, I noticed she would always say things like “Someone’s telling me I have to tell you this” 
“God told me this “
“God is speaking to me right now” 
“God speaks thru me”
“Everything that I get told in my head is always right, they are never wrong.”
“I can read people and control their emotions/thoughts”
I always assumed that she was just really religious and I didn’t really think much of it. 
A month goes past and we had our first argument. I spoke with a friend on speaker phone and he asked me about watching a movie but I told him I didn’t have wifi. He mentioned “I thought Lucy agreed to get wifi and you paid for Gas/Electric.” I told him “ Yeah but she’s having bills she needed to pay so I wasn’t really worried about it. Lucy and I hung out the next day with the person I was previously on the phone with and we were all having a great time. Towards the ride home she got really quiet and a little weird. She didn’t say anything to us. The next day she messages me while she’s working 
“I know you and John were talking shit about me on the phone two days ago I kept hearing my name get brought up and you called me dirty and all these other names, I don’t like you. Yesterday when we hung out confirmed that you guys were talking about me. Show your inner Gangster and say it to my face” I messaged her back and told her what was said, literally just two sentences, and she blocked me. Everytime we were home at the same time and I tried to talk to her, she would just look at me and ignore me. A week later she apologize and I forgave her. I asked her what confirmed that I was talking about her and she kept saying a voice in her head kept telling her and her voices are always right. I noticed when she has issues with other people, she won’t confront the situation, she always get the “answers to the problem” in her head. A few times I noticed her talking to herself but I couldn’t make out what she was saying. A month after all this we were hanging out, I surprised her with cookies, food, and weed and we had a movie night. The next day I asked her if she wanted to smoke and she just looked at me then got on her phone. The same day Lucy posted on Facebook “People act like your friend but really just envy you.” Then the next day she posted “ I hate when mfs sleep with the tv on, turn that shit the fuck off” I knew this was about me because I had the tv on the night before. The volume was set lower then it usually was at. I always asked her before if the T.V being on was an issue and she always told me she never noticed it. I left for a few hours and my tv remote was gone, it’s ALWAYS on my shelf. I tore my entire room apart and could not find it. I asked her if she took it and she just laughed and got back on her phone. I lucky could download an app on my phone and watch tv, I could tell it made her mad. The third day that she’s been mad at me, I went to watch movies on Netflix and the WiFi wasn’t working. I thought maybe a cat unplugged it just to find out the battery was taken out the bottom and she hid it so I couldn’t use the Wifi. She pays $60 for wifi and I pay $150 or more extra a month for gas and electric so I was very mad about this. The 4th day I left for a few hours and came home around 11pm at night and I couldn’t get the front door open. I knocked on the door for a few minutes because I knew she was home but she didn’t want to answer it. I climbed thru a window just to see she put a chair in front of the door so I couldn’t get in. The heat was also turned up to 85 degree’s (this isn’t the first time) when I always keep it at 67 because I can’t afford to keep it any warmer then that. The 5th day wifi got turned off again, more status’s were posted about me. She was on the phone with someone and I can hear her talking about me very loud like she wanted to to hear. I go to confront her and she just laughs at my face and continues to talk about me. I am only 5 foot and 100 pounds, Lucy is closer to 6 foot and at least 200 pounds so I don’t want to push her to where she fights me. The 6th day, she still didn’t tell me why she was so mad at me. So I decided to look for a journal that I know she writes in. I know I am wrong for that, but I was tired of living with someone who’s acting like a child. I went thru her journal to see her writing things like :
“I can control what people say and do” 
“I am in control of reality and I am the main character”
“God and I are the same people and he speaks thru me.”
“My ancestors and God tell me everything I need to know and they are always right, always believe your voices”
“Nothing in this dimension can harm me, I am god and am invisible “
“She knows what she did, she doesn’t deserve me as a friend, I want her to beg for me”
I got a little freaked out by that, nothing gave me an answer on why she was mad. The 7th day she stood in her door way for at least 30 minutes and did not move. Every time I would leave my room, we would make eye contact and I would look away. I could still feel her looking at me and it was making me uncomfortable. I went back and forth from my room to downstairs at least 2-3 times in a matter of 30 minutes. Each time she was still just standing there, not doing anything. That night I woke up around 2am and seen the hallway light was on and something looked like it was moving from the other side like a shadow. My door was shut all the way and my cats were in my room so it couldn’t have been them. I peak under the door crack and see her feet just facing my door. She stopped moving and just stood there. I instantly locked my door and looked under again and she waited about two minutes and went back to her room. We have only lived together for a little over 3 months and she’s just getting more weird towards me.. I was never able to bring any friends over or Lucy would freak out and be really mad. A lot of people told me she might be jealous of her or jealous of me hanging out with other people. The only person who know’s is her and she’s keeping it a secret. I’m debating whether to break my lease with her or not. She won’t talk to me at all and I don’t know what she’s capable of.. her two past best friends warned me that she was like this and gets mad at them for no reason and that’s why both of them aren’t friends with her.. I just don’t know how to go about this situation. Should I move out and just not tell her till I’m already gone? Is she schizophrenic or just delusional? Do you think I’m making a big deal out of this and it’s really nothing to worry about?