Halloween costume made my bf lose it

24F went out for Halloween with my gfs to a party. I did dress up, I didn’t tell my bf I went and now he’s all upset. saying hurtful things like once a whore always a whore because when we met I used to strip then quit for him. also how it was cheating that I went because I didn’t tell him,, thoughts? isnt this annoying? I just wanted to have a good time with my friends I didn’t hookup with anyone.