My boyfriend was forcibly kissed by someone else, I want to tell him about it

Well, what should I say? You tell your boyfriend; I'm afraid it will make things worse. If you don't tell me, I feel uncomfortable; but it's because you trust your friend too much; so you can only I feel sorry for myself; you should have given him a slap at that time; no matter what, this is what you should do;; After you have a boyfriend, try to go out with the opposite sex as little as possible to avoid unnecessary misunderstandings;; There are few pure friends of the opposite sex in this world. It's so pitiful;;;