My friend used to go out with this guy and she still has on and off feelings for him , they flirt quite a lot . Recently him I have been talking just as friends and then it lead to him saying he wanted to do "stuff" with me and I agree (we haven't done anything ) I don't know how she'll react if she ever found out but i'll never go there with him cause she's a really good friend of mine.
Secondly a guy who's my best friend liked this same girl and then she rejected him (this was sometime last year) but sometimes says she wishes she hadn't (hasn't said it recently) since the guy is my best friend he came to my house like usual but this time we kissed twice and now it's kind of awkward.
Should I tell her everything and am I a bad friend for saying I want to do stuff with Guy 1 and kissing Guy 2?
Do they actually matter?