When a young man gets married, he can no longer keep a young unmarried woman as his best friend. He has a new best friend. That would be his wife. That's who he shares his thoughts about everything and anything with. And they will have their ups and downs. When they have a tiff, as couples do, talking to one of his guy friends about it might be okay. Talking to you about it would not be. It's not appropriate for him to have a young, unmarried female as a close confidant. His wife wouldn't like it, and she'ld be right not to.

It doesn't sound like you really want an association with him that isn't the real close connection you once had. So maybe it's best for you to just let go and move on. That seems to be what he has done as well.