My boyfriend cheated on me I ask him when I first found out he lied and also the girl lied when me and him got into a argument three weeks after I asked him he said that’s why I fucked . Her I txt the girl and said why did you lie about having sex with him she said that’s not her relationship problem I’m so hurt i don’t know what to do I sent him the messages of me and their girl he had sex with he said I’m doing

To much why and I still arguing with her my feelings are hurt and I can no longer trust him he lied to me for three weeks about the situation then end up telling me two days ago after me and him got into argument