Oh, what a GREAT topic. I have soooo much to say about this and it is incredibly inspiring to read all of your stories!
I was always chubby - very bad self esteem. As a teenager, of course, I got love and sex mixed up big time and made a lot of stupid mistakes. My sister was the skinny athletic beauty queen - I was the short, plump, bookworm. We fought like cats most of the time

I got into a violently abusive relationship in my late teens, that lasted until my 23rd birthday. During those years, I went up to about 175 pounds and he seemed to encourage that - that way, he said, no one else would look at me.
As soon as I escaped that relationship, i was determined to get thin and I started exercising and eating low fat rabbit food. I was fanatcal about it - step aerobics, boxercise, high impact aerobics after work 4-5 days a week. Within a year, I was 145 lbs and had six pack abs and muscles all over. It was probalby the first time I could hold my own with the good looking popular girls at work and I got a LOT of attention from men. In fact, after a couple years, i started to get really disgruntled about it because it seemed like I was merely a body - there was NO one in my life who cared if I had a brain (and admittedly, I have a way high IQ) or soul. Just good legs and a nice ***. So - it was fun for a while - the attention really nice - but it all felt so SHALLOW.
So I stopped the fanatical exercise and eating. Besides that, I quit my job and started a business around the same time so the gym was no longer on my walk home. For the next couple years, I gradually gained weight - and got really comfortable not having any relationships. I figured if someone was going to like me it would have to be for what was inside - I wasn't really concerned anyway because I got really happy and content alone anyway.
One day, around my 30th birthday, I had a mind boggling encounter with a man from another country - we just fell head over tails in love, from the first moment. He seemed to be the "one" - and I was deliriously happy for about a year and a half. In fact, he moved here to go to school, and I started learning his language in order to move to his country after school. We had an incredible intimacy, a total mind-body-spirit connection and a wonderful sex life. I thought - gee, finally, someone who loves me for me! I was so relaxed and free during that year and a half!
One day, without ANY WARNING whatsoever, he woke up from snuggling in bed with me and said "I'm so sorry, I can't do this any more" - got dressed, and left. From a distance he called me, who was obviously devastated and tried to explain himself. There were many reasons ... not wanting commitment was one of them. But the one reason that cut me to the core was that, he said, he was really attracted to tall thin women and he knew that no matter how much he loved me, he'd never really want to look at me - and if I was going to just keep gaining weight he was sure he'd end up cheating some day.
You could have taken a knife and driven it into my heart and it would not have hurt as much. I was destroyed and lay down and didn't raise my head again for years.
Over the ensuing couple years, I lost my business, lost my apartment, and then faced financial ruin over 9/11 and the changes in the economy. I also gained a lot of weight - passing 200 last year and hitting 220 spring. My highest weight ever. I also started a new business and started getting my life together with the help of an amazing therapist.
Anyway - last summer, I was at an outdoor festival by myself. This big long haired tatooed dude caught my eye - and apparently vice versa. He asked me out and I thought - holy crap, how can I go out with this dude? I said yes. And over the next couple weeks, he pursued me, quietly and steadily - breaking down all my defenses. For one thing, he believes that I am absolutely the most glorious creature hes ever seen. If I never lost a pound, he'd be okay with it. On the other hand, he cleaned up very nicely with a little encouragement and everyone tells us what a great looking couple we are together

I can barely remember the other guys name. And there is something really freeing about knowing that someone thinks you're very desirable no matter your size. Suddenly, I seem to have the willpower and desire to try again - knowing that I'm doing it for the right reasons, not to catch or keep a man. I've got a big snuggly loving one for all time - despte all the crap before him, I don't feel even the remotest fear of him leaving me and we are planning to get married next year.
On the flip side - I forgave my ex. I realized that I am really not attracted to fat men either - its very undesirable to me, a big turn off. I know that I'm a hypocrite and am trying to come to terms with that - but it helped me to forgive because I do understand. Doesn't mean its right, but... at least I'm being honest