Partner, Children and a house.
We are a very outgoing and social couple with male, female and other couples all in our circle of friends. We socialise as a couple and without each other.
We work in the same building but not the same department.
Partner has a relationship with a work colleague (not in our circle of friends and I don’t know them from work) I’m not happy with due to the secrecy about their relationship, some blurring of boundaries and flirting. I don’t believe they have ever had a physical relationship. I don’t think it’s an emotional affair but the defensiveness and secrecy makes me uncomfortable and anxious. We’ve discussed it a few times and both shared our feelings about it. We agreed the relationship would stop as it isn’t required outside of work hours. I don’t think it ever stopped just that partner has just been better at hiding it. I don’t think partner wants to stop/ enjoys the attention the relationship brings. I feel hurt and disappointed. I don’t think their relationship will stop and I don’t think they want it to.
I think I need to leave but don’t know how.