Unsupportive BFFs?
If she really has been a good friend to you in the past, give her the benefit of the doubt. Everybody messes up sometimes. People that we care about can and do disappoint us, but we have a choice to forgive.
Talk to her and tell her how you feel and let her tell you how she feels too. She might have some fears and/or misinformation that caused her to behave this way. She might also be struggling with her own insecurities about her weight and how your relationship with her will change.
I hope everything works out.
Dang, I've got the same story here. My BFF has been acting all weird even when I was pre-op and preparing to start this journey. We've both always been BBW's so shopping was great! She is emmersing herself in her own weight loss program and has lost 40lbs and wants to give me all of her "fat clothes" because she is a size smaller than I am. I told her I don't want them, because the first round of stuff she gave me was already too big for me to begin with. She seems to casually forget that I also lost 40lbs at the same time as her with my pre-op diet and insurance requirements for loss, but did I get an acknowledgement from her? Hate to be petty but dang... I thought we could celebrate each others losses, but its all about her. When I eventually surpass her with my weight loss, I don't know how she's gonna react, but that'll be on her... and I'm not going to worry my mind about how she'll handle it.