My relationship has just collapsed because if my partners relationship with an other man. I just discovered she's been having a parallel relationship with another man for the last two years or so.
I want to describe my experience and get your advice.
We have a child together and have been in a relationship (on and off) for about six years. Her friend is married and works near her work.
Let's call her Louise and him Chris and his wife Jules.
She (Louise) argues that her friendship is platonic and I am being jealous and controlling. I argue that her behaviour is unreasonable for anyone in a monogamous relationship.
So last year she told me they were going out to the cinema together but it was nothing I should worry about, they were just friends. I later found out they had gone for a meal as well, which she had lied about.
They meet for drinks, gigs, films and dinner.
He 'likes' every single Instagram post she posts.
She has had a photograph of this guy with his baby in her living room for the past year.
She lied to me about meeting a friend for dinner and went to meet him instead.
I saw messages from her to him calling him "my love".
I saw messages from him saying "Want to get together for some daytime cinema fun?"
I saw a message from him saying "Jules and Sid are away next week so we could meet up?"
He messaged her saying he had got gig tickets for her birthday four months in advance.
This behaviour has destroyed our relationship as I have broken it off after months of arguing.
Have I done wrong? What do other people think?