<human>: Can you provide a brief overview of the text?

So, my best friend and I are both engaged. I've been dating my fiancé for three+ years and have known him my whole life; she has known her fiancé for about 7mths. This is mildly important later on. 

Her and I have had some problems, basically her putting guys ahead of me (cancelling plans, never responds, not setting boundaries, letting her guys talk to me negatively, etc). Since we both got engaged, I honestly didn't know if I wanted her as my MoH because we seem to be growing apart and her fiancé has been so negative towards me and my fiancé. But she has been my best friend for 10 years and I consider her and her family MY family. I wouldn't know who else could fill her role.

I view her fiancé as very controlling, which is a completely different topic- but as a result I hardly talk to her/see her. Since they began dating I've only seen her once alone, and she was on her phone with him nearly the whole time. 

She hasn't been involved in my wedding planning at all, nor has asked about it. Her wedding isn't going to be for another year and a half- so she doesn't want to start planning yet even though I make sure to ask if she needs anything (she also asked me to be her MOH). 

I bought my dress yesterday and sent her a picture. I was very self conscious about the fit in the tummy- but my aunt and mom assured me that it only looked that way because of it being cinched to stay up. And I plan on losing some weight and wearing spanx. Instead of telling me I looked nice, or anything positive- she basically mirrored all my self criticisms and added "I hope your ordered a bigger size". Then the conversation moved to her wedding and her life again. All of the joy I felt about finding my dress was squished by her negative comment.

A lot of other stuff has happened to make me reconsider her place in this wedding, but this is already stupid long. Has anyone else had this issue, and how did you handle it tactfully?
<bot>: Best friend and Maid of Honor hasn't been a good friend. I'm considering asking her to step down, and possibly cutting her out of my life.