Ouch, anyone who calls you an elephant and suggests anorexia as a way to deal with it is certainly not your friend and should be cut off immediately.
As for the friend who is "tired of being a parent", I'm sorry that someone who was a source of inspiration for you cut you down like that. Is it possible that they didn't really mean it? I find that sometimes people who have a lost a lot of weight don't like to talk about it a lot, as if they want to forget that they ever were really heavy. I'd give them some time to maybe come back and apologize.
The internet is full of people who will disagree with you just to be contrary and have no sense of how to do it with out being rude, mean, and just down right crass. Ignore them. Spend more time with us
Hope your day get's better!