I have tried to lose weight many times over many years. At one point even joined a gym (which I HATE) and had a Personal Trainer (which was good, but expensive). I did lose some weight, but I hate gyms and really only went on the bike unless I was with her, and it just wasn't worth it to me.
I always quit when I tried in the past, even with the gym membership. However, being on here, while I have not made as much progress as I wanted to, I have not quit and do not plan to. Partly I think it is due to this forum and the great people and keeping me accountable, but also probably due to the fact we are finally planning our wedding for June 2014 and I want to look amazing (we have been engaged over 4.5 years). But honestly I think without this forum I probably would still have given up and would not be as determined to keep it going.