I'm sorry you're going through this.

Uhm, very ashamed to say this but I will reply from a "good jealous" friend's perspective...

I say "good jealous" because I never meant my friend any harm, I never wished ill things upon her or resented her. I never begrudged her anything, I was happy for her, but it magnified the sadness I felt for myself...

I have this friend, we were so close in HS, and even as adults, we kept in close contact even though we couldn't see eachother regularly. Anyway, when I was going through a realllly crappy period in my life; escaped an abusive ex, dad and eldest brother died, and got diagnosed bipolar, I just couldn't handle being her friend.

I found myself jealous for the first time in my life, boy it was highly uncomfortable. Its just that my friend had everything going for her, career, good husband, nice house, and my life had fallen to pieces.... I didn't understand whyyy she had it so good and why I was thrown to the wolves.

So yeah, I withdrew from my friend, not because of anything she had done, but she represented everything I wanted and didn't have. I was also afraid that I would grow to resent her, and that it would show...

Well once I picked up the pieces of my life and felt confident enough to be friends with her again, I let her back in. She didn't even ask for an explanation or an apology, didn't even make me feel guilty for unfriending her on FB... She just sent a friend request at the time I was thinking of contacting her and I accepted. As they say, the rest is history.

Idk her though, so I can't say for sure if her behaviour is anything related to what I experienced and I honestly don't know what you should do besides back off or confront her with a heart to heart talk.