<human>: I moved to a new state, and met a new guy (28 M).  I knew he had a girlfriend. We shared some steamy g-chat exchanges for about 2 months last Fall. I was slowly becoming good friends with his girlfriend 28 F), and the g-chat "sexting" stopped. Fast forward to now- his girlfriend is one of my closest friends. She find the old g-chats.

I want to know how to honestly and sincerely apologize. I do feel horrible. I never knew how to tell her. Nothing ever happened between me and the guy besides the g-chats. It wasn't even emotional cheating, we never had deep talks about anything. It was just a purely cheap, physical thrill.

I was thinking of writing her an email, bc she has said she is not ready to talk in person. Can anyone help me with wording it?

Can you give me the gist of the text in a nutshell?
<bot>: Sexted with a guy who had a girlfriend. Became very good friends with girlfriend (sexting stopped). 11 months later ,she finds sexts. How do I sincerely apologize?