Instead of letting it get you down and depressed use that "hurt" and energy towards changing things. Everytime you think about it do something positive, whether it be exercise or even a few sit ups - whatever it is, just use it as MOTIVATION to change.
You should read my story here:
http://www.3fatchicks.com/forum/show...t=78675&page=6
(last post I think)
I know how painfull it can be to be humiliated, but instead of letting it get me down further, I just thought, 'I am SOOOO going to prove you wrong, and when I do you won't know what to say, and I will feel great!' --- it was just the shove I needed to make sure I was going to do something in the right direction.
I just hope you can find the strength to do the same