Would you forgive him?

My stepfather was very drunk, more than usual (yes, he’s an alcoholic) and yelled at me and my boyfriend for accidentally locking the front door while him and my mom were outside tanning. He was kicking the door and yelling for me to “open the fucking door” and that maybe my “shit boyfriend” locked it. For one whole hour he was constantly scolding us to my mom for locking the door. He was yelling so loud that we heard him downstairs while I was showering. He said that we probably locked it “to fuck each other”. Me and my boyfriend had just came home from work and that’s when I usually lock the door because neither my mom or stepdad leave the house after the afternoon. It was a habit for me to lock the door and he kept yelling at us and calling us names and my mom did nothing except telling him to calm down. I broke down crying after he had been constantly yelling at us for almost an hour, so my boyfriend packed our stuff and we left for 4 days to go to his parent’s house. My stepdad refused to apologise because he didn’t think he did anything wrong, and that I locked out “the only people that pay for shit in this house”. Which isn’t true, I help out with rent and pay for my own groceries. He was blatantly disrespecting me and my boyfriend for a whole hour and refused to acknowledge that it was wrong. He went to grab my boyfriend by the shoulder to talk to him about why we were packing, and my boyfriend told him calmly not to touch him. To which he started nagging about how we’re so sensitive. When we left my mom kept texting me and excusing his behaviour, saying that he had been drinking too much and that the weather was too hot. He never even bothered to apologise, not even over text, until I told my mom that my boyfriend didn’t want to visit us anymore, and that we both felt unwelcome and uncomfortable. This week we’re staying at his parents house because we both have vacation and none of us really wants to go back home to me. After almost a week he texted my boyfriend to apologise, my mom then called my stepdad “the sweetest man for apologising”. I don’t accept his apology and neither does my boyfriend. My mom insists on having a birthday party for me with my family at their place, with my stepdad and my boyfriend there. But I don’t want to. She’s also trying to guilt trip me into coming back home. Should I just suck it up and forgive him?