Dh and I have a pretty rocky relationship. I'd say due to issues with his kids and also around sex (since I had our 2 dc). Over the 22 years that we've been together, it's been very up and down.
In 2017, we separated for 6 months.
While we were separated, he signed up to fb.
He won't let me become "friends" with him. His reason is that he's joined groups that I would have no interest in, so it's not got anything to do with me.
Every time I bring it up, he shuts down the conversation. Would you think this is a red flag?