Don't even think that what she said was about you. You are showing courage, making positive decisions about your future and you are giving yourself the option of a much healthier, happier and longer life . She is ignorant about this whole journey to wellness, she is jealous of your bravery to make such a substantial change in your life, she doesn't have have the self confidence to make this kind of decision for herself. You don't own any of her perspectives or dismal outlook.
You are strong and you can do this. Perhaps when she sees your success in the coming weeks and months she will see you as the inspiration she needs to take this plunge for herself! She's just not ready and your determination is likely a scary mirror in which she is reflecting her current condition.
Feel great about YOU!