I been using H for over 15 years, and now im trying to detox myself.

Your desire & strength of character can be the biggest tools to quitting a bad habit. You are talking about something that takes a much stronger hold than many other drugs, however, & it is not surprising that it would be extremely difficult. Cutting back until you are barely ever using any & in less amounts is a great way to start... Try finding some good friends who can be encouraging (not ones who would drag you back into it) & try putting more energy into some hobbies or socializing in places that you couldn't do H in... If you can get yourself down to a point where you hardly touch the stuff, it will be a lot easier to drop it altogether, but after 15 years!!! You can't be expected to just stop cold turkey on your own & survive the withdrawals... good luck!