At 26 there is much potential ahead, its almost like a blank sheet of paper.
One thing that may help at that age is to find something or things to get totally consumed with. Hatred of cocaine and no room for it because you have something else more important. It could be a total dedication to fitness, to education/some field of study. How can you build the body you want, the career you want? Dream these dreams and refuse to let cocaine or any of these yo yo people get in the way.
Stick around, it usually takes more then willpower alone but i think a little is a prerequisite.