Bridesmaid drama

It doesn't sound like anything here that can't be worked through. You asked her why she was distant, and she gave you an honest answer. Sometimes we don't realize how much we talk about our weddings (because is it on our mind 24/7!), and need others to give us a check. Using the boards like these is a great alternative for sparing friends and family from non-stop wedding talk, because we love it! Haha. The other stuff is kind of trivial to be honest - not tagging you in FB (??), not participating in a group chat (I DETEST group chats and she may feel the same - maybe she prefers one-on-one communication), and wanting to so something special for you on her own rather than be lumped in to a larger book - all pretty harmless. Making her own scrapbook is honestly a pretty sweet gesture and testament to how she views your friendship - don't lose who you call one of your best friends over that. Go out for tea or lunch soon - when was the last time you spent some one on one time together just talking (not about the engagement/wedding)? Ask her directly how she prefers to communicate and see if you can find a solution that works for everyone.

I think she's jealous, I'll be honest you can really do anything with a bridesmaid like that. At the same time though I wouldn't take her out of the bridal party because that's the same as ending a friendship.

A lot of my bridesmaids were very nonchalant and uncaring about the wedding as well, and were distant, but they got their act together the closer the wedding came. I literally could not have asked for better bridesmaids, they were pretty amazing.

Your bridesmaid is being a bad friend. Whether or not she likes your MOH has nothing to do with her supporting you and being in your wedding. She's punishing you for her dislike of your MOH, and its unlikely that's just going to pass on your wedding day.

You have done a lot to salvage this friendship. I would have a serious check-in with her. Tell her you value her as a friend but she isn't being a good friend to you and the drama between her and your MOH is affecting your friendship and your ability to enjoy your own wedding planning process. You can acknowledge that you won't bring up the wedding unless its an absolutely important "need to know" detail, but that she needs to communicate with your MOH and the other bridesmaids and you aren't going to continue to be a go-between because she cannot grow up and get over her petty dislike of another human being who you have signified is important to you. Unless her MOH has done something egregious and worthy of being shut-out (which seems impossible since they haven't met), she's just being childish. If her behavior doesn't improve, I wouldn't hesitate to remove her from your wedding party, because she's clearly not able to fulfill the role of supporting you if she cannot get over her petty jealousy and actually be your friend.

Bridesmaid group chats are the worst, especially when you don't already know everyone, I wouldn't participate either. I'm sorry youre hurt by her actions at the moment, but I would just continue to treat her like a friend and leave your wedding out of it.