relationship help

ok so im in a relationship with this guy for 3 months. I know it's not a very long time, but I have really string feelings for him, more than I ever felt for anyone. I honestly believed that we were going to spend the rest of our lives together. In the beginning of our relationship we talked about our pasts. I did something extremely horrible, I had a 6- some on a drunk night and I deeply regret it. He also did some questionable things, he fucked people left and right and he slept with people who were in relationships and he slut shamed them and verbally and mentally abused them. I have never cheated on anyone in my life, and I told him that. He doesn't believe me, he tells me his mind can always sense the truth, and he can sense i cheated. Lmao what kind of bullshit is that. I swore on our relationship I never have. He keeps bringing up that one drunk night i made a mistake and making sure I feel like **** about it. what the **** do i do? I love him to death! but this is really stopping me .