Cousins bachorlette weekend in vegas!

So my cousin is having her bachorlette in Vegas in august . I was talking to my bf about it and he told my cousin I could go. But then we started talking about it and starts saying how my cousin is how she’s a flusy. Then tell me oh I bet she is going to have wieners everywhere. And I was getting annoyed because how does he know that? What if it’s the total opposite? So then I told him I wanted to go and he stood quiet and I told him you get to go out all the time and I’m always home with our daughter. I’ve only gone out maybe 2-3 times with a friend and that’s not even going to bars or anything literally just a movie and dinner. So I basically told him I’m going whether you like it or not I’m going. I feel like I deserve to go and have some mommy time and enjoy my self. I even noticed I’ve been getting frustrated with my child and I start to cry. I know I need this. So I mentioned it again to him about how I should ask her if I should pitch in to stay in the same room with her etc. and he said you should but you know if they have wieners everywhere I’m not going to like that at all. Does he mean real or fake? Idk he didn’t even specify. So I just told him you shouldn’t talk because there was one incident where he went out with his friends & lied to me and told me he was at his friends house & him and his friends ended up going to a strip club and I found out weeks later through his friends girlfriends who had found out the same day as me. I was upset that he lied & then tried to turn it on me and left that was years ago. But I feel like since I’ve became a mom I’m always at home he is always out with his friends and sometimes doesn’t come home till the next morning. I even told him my cousin is having someone else plan everything and I feel like he doesn’t trust me . I almost feel like he’s trying to start a problem before I even go. It’s in august so I have time but then I have to rely on him to pay for everything cause I don’t work and am a SAHM. He has done things to me (cheated on me even when I was pregnant, and goes out and sometimes doesn’t come home till the next morning) & I feel like one weekend he will have the biggest fit & start causing drama between me and him so I don’t go. And on top of this I don’t want him to ask my mom to watch her while he works and then lie to her and say he’s still working so he can hang out with his friends because that wouldn’t be right. He told me that I seem ok if there’s wieners. I honestly don’t know how I would feel never been to a bachorlette or had a wiener in my face etc. and he thinks that I’m trying to get pay back? I laughed because out of alll the stuff he’s done I’ve been faithful Asf