Decided to stop using coke

I first started using aroud 6 years ago . At first i didn't see it as a problem because I would only do it occasionally around every 1-2 months. Over the last year I started using it twice in a weekly basis, its becoming a huge problem as im spending most of my money on it. Im usually a very quiet, introverted person but when I use I get overconfident which often leads me to doing/saying some stupid shit which I always regret. Looking back I think trying it was one of the worst mitakes ive ever made.