My husband's best friend, M (25), urged him to be unfaithful to me.
I recently went through my husband's phone while searching for something specific in our messages, and I stumbled upon his conversation with his best friend. In their messages, his friend—who is in his twenties and single—was openly encouraging my husband to cheat and have fun. This friend, who is divorced and struggling with high child support, seems unhappy and wants my husband to follow the same path he did. (And yes, we do have kids together.) Although my husband made a mistake by flirting with a coworker, we addressed that issue and resolved it. However, he still maintains his friendship with this male friend, which I find incredibly frustrating. Just seeing him makes my blood boil; I feel disrespected by what he’s suggested to my husband. It's wrong for my husband to continue this friendship, especially since there's a risk his friend might encourage him to cheat again. Whenever I ask my husband why he stays friends with someone who undermines our relationship, he usually shrugs it off, apologizes, and continues being friends with him. How should I respond when he dismisses my feelings like that?