so freaking upset 😞

So my boyfriends dad treats him like dirt but his dad treats his daughter like shes queen B. His dad has always talked trash about me to my boyfriend saying things like "shes using you" and mind you hes SOOOOO fake to my face ALL SMILES. Well today my boyfriend comes home and is like "Dads planning a trip, and he told me everyone's invited including my sister and her boyfriend (whos been in the pictyre for like a month) and his dad straight up told him "your girlfriend isnt invited" My boyfriend defended me of course and said he isnt going but I cant help but feel like I'm the reason my boyfriemd isnt being treated right because if me and I'm over here trying to stay calm cause I'm 4 weeks pregnant and overly emotional but I don't know what to do.