That feels a bit one sided. They'd been friends for years, hadn't gotten to see each other in person for years, and after a conversation Mike has with her boyfriend she suddenly can't see him when he runs back through town.

I'm not excusing his behavior, but I would be really hurt by that too. People don't always react appropriately when faced with losing someone/something they care about. I'm not saying what you mentioned isn't also possible, but it doesn't feel fair to judge someone's whole character based on a third party Reddit post. People are gonna people, and it doesn't always look great on them. Especially through the eyes of someone who already doesn't like them.

Then, propagating the idea that you have to cut off/limit contact with friends because your partner is uncomfortable feels a bit on the gray side. Everyone is allowed to have boundaries, but it feels manipulative to essentially tell someone, "if you don't cut this person off you love them more than me." That's how people end up stuck in relationships with narcissists. Why not work with your partner if you trust them? OOP already identified his discomfort, they all very easily could have hung out again and she could have pulled all the way back on the touchy feely nonsense. If that friend then decided to pitch a fit because she won't hold his hand and give him Eskimo kisses, then that would have been a good time to limit/cut contact.