This would make a great Medium story, if you haven't written it already.

Not as much your weight loss journey, but the fact that you kept it quiet and what you observed about the responses of your friends.

I wrote something similar about how the people in my life responded to my getting a bad haircut.

https://rosalindwarren.medium.com/the-bad-haircut-blues-f7c2a56e21f?sk=ada47c31b53728751c2c6d3df8ff01e4

Anyway, if you write it, please tag me. I don't want to miss it.