I know you can do this dude, be thankful you had detox. I got spun out on several drugs loosing most of everything around me, what made me clean up finally was an overdose that lead to depersonalization on christmas night. Lucky for me this made drug use not enjoyable at all, I couldn't feel my pulse, nor most of my body. I felt like only bits of me existed in the real world and the rest was numb, I consumed a few more times like this but it lead to severe anxiety attacks and a physically painful trip.
Now months later I not only feel back to normal but I have got a new job, new girlfriend, got on good terms again with friends and family. I finally feel successful for once in seven years. Not to mention a few weeks ago I asked myself "Why do I honestly smoke?" and came to a conclusion it was nothing more than a nervous habit and I dropped it cold turkey without so much as a second thought. It was easy compared to drugs actually.
Now that I am on my feet again I tried marijuana and a few other drugs, none of which feel right anymore, it's just very uncomfortable since my overdose. I do think however I may try a psychedelic or two again in the distant future. But as for now I am just enjoying the fog that has lifted.
Point to all this is you WILL quit if you think you need to, you just have to realize that only you can do this for yourself. Have faith in yourself, be proud of what your doing.
Also something that helped me. I kept a list of reasons why I wanted to quit drugs in my wallet, right in front of my money so if I ever tried to buy drugs I would be forced to look at it.