This observation on Lust vs. Self-Control is straight from http://www.whitestonejournal.com/
They say it better than me anyways.
Self-control and self-mastery prevent pleasure from killing the soul by suffocation. Legitimate pleasures are controlled in the same way an athlete's muscles are: for maximum efficiency without damage. Lust is the self-destructive drive fore pleasure out of proportion to its worth. Sex, power, or image can be used well, but they tend to go out of control.
Back to my own thoughts. If you are trapped by lust or sexual sin, feel that you have the scarlet letter branded on to you and you can never escape, know that Jesus can set you free. I don't say that lightly, I mean it. He is powerful enough. This sin doesn't have to have mastery over you. Day by day trust Christ, tell someone trustworthy in the Christian community that you want to be free. He will set you free as you trust him daily and renounce this sin. I am not saying it will be easy or that you might not have some set backs. But God is more powerful than lust.