Everyone tells you you are going to fail - the fat ones secretly want you to fail so they don't look bad in comparison. Everyone tells you what you are doing is crazy (and what i was doing was hard and a little crazy - i can detail it if anyone cares). I stopped telling people what i was doing to lose weight, my mother was convinced i was going to die. I straight up started lying about what i was doing, i started telling people i was just eating healthy and exercising more. And yes the first 50-70lbs everyone is one board (those who didn't know about the fasting) but as i got closer to 200lbs , people who before weren't bothered by me skipping meals started saying things like, "you are already pretty thin and healthy, you can come out with us drinking and pizza this one time".
There is a huge social aspect to eating, for me that was the hardest part, i was still cooking my family meals, but i wasn't eating them. There is a lot of brain power thinking about "what are we going to eat for lunch", "what are we doing for dinner" that takes up a big part of most peoples days. It is hard to get away from mentally.
It is hard, it isn't fun. But i ate literally whatever i wanted for 15 years, so now, i have to pay for it. I have accepted it, I cant eat like a normal person, its okay, after 3 years it doesn't even phase me anymore.
I ran the Houston marathon in Jan 2003 at 194lbs - by Dec 2007 i was over 320lbs - there are reasons, but its all bullshit - i just liked overeating.