Trust issues

Me and my boyfriend been together for about 2 years but it hasn’t been easy in the beginning of our relationship I thought he was so perfect and he wouldn’t hurt me I thought it was us against the world til I found out he was texting other females and getting nudes from them I felt so alone like I had no one, he’s the only person I really had I thought because we were living together that wouldn’t happen but I was wrong. I would leave him and move in with my aunt but I would just go right bacc with him. I don’t know if he tells the truth or not because when I would confront him about it he would lie and says he’s not doing anything and make me feel bad about even bringing it up. One day I really got tired of his shit and started going off on him (I started punching him in his face in the car) after all the mess we been thru we are now gonna have a baby I’m 21 weeks and I trust him enough to don’t even care to checc his phone anymore but I just get these thoughts in my head and I have feeling to sometimes and when I found something suspicious I confronted him about it and he got mad and said he’s not doing anything and it’s up to me to believe him or not but I can’t help it when HE made me like this 🤦🏽‍♀️ and I know it’s my fault for still being with him but he changed me in so many ways all I can do is be faithful to him I guess I just wished he’d never did what he did