Hi Shell,
I've been the token fat friend for as long as I can remember until recently that is.
I had been feeling down and sat wasting time on a social networking site and I saw a quote by a friend that I don't acutally know (you know how these sites are) saying 'remember a time in your life when you were truly happy and repeat the formula' The only time I could think of was in my 20's when I was slim and what I considered beautiful. This was a time when I could walk into any shop not matter how poorly made the clothes were and find a bargain as they all came in small. I have been holding this thought in my head all week and am now using it to spur me on towards my goal.
Yes you are right you can do it as can all of us. We just have to decide to be happy, really happy again.
Good luck girl and go for it!