Girlfriend obsessed with celebrities

My girlfriend has this huge obsession with the k pop group bts she has photos on the bedroom wall, blankets of them plushes, albums, pictures,poster's, has them as her lock and homescreens, has a tik tok fan page saying she's one of their girlfriends. Spent thousands of dollars on there concert and gets mad at me for saying she's childish and kicks me out her apartment because I told her to take the pictures of the wall. And now I'm homeless because my parents don't want anything to do with me I'm suspended from school and I'm currently living with my only friend with his family. Mind you shes pregnant with my child I dont want to leave her. And she kissed another guy IN HIS HOUSE! I NEED HELP