My mom and my relationship

I live with my parents and have to. I am in nursing school. I’ve been dating this guy for seven months and it’s going well. I’m 23 and he’s 24. Since the beginning of the relationship, my mom has been wayyyy too involved with it. Every little detail about it is judged and I always feel like I’m being observed. All my actions are scrutinized when he leaves and he’s always judged. Meanwhile my brother is dating a new girl who has a lot of red flags to me and my mom is not nearly half as hard to him. My mom doesn’t see red flags with my boyfriend that’s not what I meant, I just meant she’s judging what we do and how we do it. The way we talk, the activities we chose to do, our romance, what I wear (is a huge one) she calls me a slut for wearing shorts around him. I don’t know what to do. If I bring this up she’ll scream at me. I cant never be right.