boyfriend in love with ex? F18 M17

hi guys first off i’m gonna give some background context to me 18F and my boyfriend 17M we’ve been together about 6 months now. We met last spring and i lowkey thought he was gay…. anyways me and my ex bsf started hanging out with him and we found out he wasn’t actually gay. He had a girlfriend(17F) and she was absolutely gorgeous and he was OBSESSED but from what i knew at the time i think they weren’t actually dating they were on and off or something like that all i knew was that they were toxic as f. Anyways sometime passed and like maybe a month into us hanging out he ended up going to jail and then to rehab after that. During that time he was away my life COMPLETELY fell apart and i had no one. So when he got out we got super close but nothing romantic because i had a boyfriend at the time and he was still WAY obsessed with his ex. Like im talking stalking her social media for 23 hours every day. Literally. But by then she had gotten a new boyfriend and she did not like my boyfriend at all but was still lowkey leading him on and entertaining him. We were best friends and then like all of a sudden in january something clicked in him and he wanted to be more. (mind you i said no at first because i didn’t want to catch feelings and i thought he was still obsessed with his ex). Anyways that didn’t last long and i ended up giving in and feelings were caught. ESPECIALLY on his side at first. He gave me an ultimatum that i had to drop my guy friend that was literally the only person who would listen to me. Wtv i ended up blocking him and i still feel guilty about it to this day. I pushed for it not to happen especially because ALL his friends are girls and he has made out+ more with multiple. But i trust him. After that i feel like i started completely relying on him because i had gotten kicked out of my house a few weeks before so i was living with him and i just left my job because my boss sexually assaulted me. Anyways we became completely codependent with eachother but i was still catching him search up his ex and talk about her to his friends and we even “broke up” a few times because he wouldn’t stop and that’s disrespectful. . Anyways fast forward im back at home and he’s basically living with me because he sleeps here everyday and spends all day here when im not at work(i just started and im super excited😛). Anyways im going to give you guys a few more problems to see the whole picture … 1. he doesn’t let me go through his phone unless i ask him to and when i have gone through it in the past and found stuff he would just get mad at me for going through it and saying “you knew you would find something and you wanted to cause problems” 2. he has a prescription and when hes on that prescription he completely ignores me for DAYS the only words we will speak to eachother is i love you and we spend every second together. When ive brought it up to him he says im dramatic even thought our whole dynamic changes and he wont even kiss me. 3. continuously thinking about his ex(she carved his name into her thigh so he thinks she did a spell on him)(he says that he misses her as “just a friend”. 4. will talk bad about me to his friends when we fight when he would never ever do that when we first started dating. (he treated me amazing and it was so amazing i would have done anything for him and he would have done anything for me) 5. when we fight he doesn’t take accountability and always tries to put the blame on me even when he does something and i confront him about it 😭 like what???? Anyways what actually led me to share our story is that today we were just in my room and he said the people on reddit were eating him up. I was like what and he showed me that he posted this thing talking about how his ex casted a spell on him by carving his name and that when they were together everything was so bro idek i think he used the word “intense” like boy i do not like you. He was also saying how he loves me and how he wants to marry me but he can’t stop thinking about her cuz of the “spell” i feel like ive built up so much resentment towards him and it’s just to much. please tell me what to do 💔