So over the weekend. Me (m19) and my gf (f18) have broken up due to an ex friend of mine. This friend (f18) was weirdly sexual during the time of our friendship sending messages such as "i want you to fuck me" or "You make me wet" to which I would only respond with things like "no thanks, im in a happy relationship." And "Behave." She was like this to everyone in the friend group whether or not they had a partner and she made it very clear it was all just jokes. This included dm's (with the friend and everyone else) as well as openly saying this sort of thing to all of us over xbox parties on numerous occasions. My girlfriend saw that i had her added and looked through the chats and saw these messages from this friend and is now saying that i cheated on her even though i didn't reciprocate anything or do anything sexual or anything. I have now blocked this friend. Did I cheat? Am i the asshole?