Unfortunately I fell deep in love with wrong person, she never felt the same way, I was just a rebound. This person is my cousin's best friend, after we broke up. One day accidentally saw a conversation between them which I wish never happened because I saw things that hurt me really bad, I felt betrayed. I'm not sure how to react, if I should confront my cousin and tell her everything I know because I can't stand this situation acting like i don't know anything and I feel so uncomfortable by not saying how I feel and what I know. Should I tell her everything I know?