I’m scared to leave

Me and my bf have been with each other for 9 months now and at the beginning of our relationship he messaged a lot of girls but stopped eventually. He was in a bad situation and was 110 pounds so I nursed him back to health now he’s 140. Recently he met his dad who he hasn’t seen for 8 years because his dad used to abuse his mom and the kids. His dad has court orders to stay away from the kids and my bf practically moved in with him already 2 weeks after meeting. He’s been acting so different since he’s been with his dad. We usually spend 3 days together a week because we have work the other days but now I see him 1 time a week. We used to face time all the time and now when we even do it’s with his dad and his dads wife in the room. He’s been distancing himself from me and it really hurts. Yesterday I asked for him to go to his room so we can have some privacy while we ft and he threw a fit. I’m emotional so I started crying and he just mocks me and laughs in my face and hangs up on me. After an hour of me not replying to him he keeps spam texting me. He’s so different and disrespectful towards me and I don’t know if it’s a phase or not. I actually wanted to be with this guy forever but his dad is being such a bad influence towards him. When I try to talk to him he doesn’t listen to me and automatically thinks I’m attacking him. I need advice please 😭 i hate heartbreaks