A friend of mine cheated on his gf. The only reason I know is because the girl he cheated with is my roommate and I saw him leaving in the morning after what sounded like certain noises. He didn’t see me and she was still sleeping when he left so she doesn’t know I know either. I don’t know his gf. I’ve only met her once and she was really nice. It is so tempting to ask my roommate about it but it’s none of my business. We all hang out sometimes so it’s going to feel really awkward for me. Not sure how to play this one because I’m also disappointed in my roommate because we both agreed we liked the gf.