There are interlopers in my house!!

There are interlopers in my house and I don't know what to do. I literally just arrived home home, to find the man my mom rented my room out to, and her fiancee. My house that was once a completely female environment now has men. I can't help but be hesitant because the last few men the broke in to our sanctum forever changed it for the worst. Now after 4 months my mom says that she's in love and ready to get married, and I want to be happy for her I really do, but I can't help but be weary. I don't want her to be hurt again, but there's nothing I can do now. She has made her choice, she chose this man, and I hope it all works out. My childhood was far from perfect, it was filled with a perpetual state of chaos but in between the drama and the trauma were some really good times. I loved living in a completely female centered house, but now that has all changed and even though I no longer live at home, when I come home I still want that there. sigh I hope it all works out