Welcome to the forum. I remember at the beginning of my usage asking that same question over and over: what is wrong w/ me??? The answer is: we are addicts.
Being an addict doesn't just "go away." It will get worse and worse until you have no life left. You need outside help like we all do. Firstly, you will have to keep away from pills. Most importantly, I would talk to a counselor and go to an NA or even AA meeting. Everyone in there understands and has had the exact same desire as you. It does go away, but only w/ a lot of hard work in a recovery program.
Hi and welcome....I agree with jifmoc I lived in active addiction for 35years it is a progressive disease that only gets worst with time it was the last 15yrs that brought me to my knees with the pills I to sat and wondered how long it would take until the desire to use would go away.....it wasent till I hit the rooms of N/A that my life started to change by working the progam going to meetings I lost that desire to use....something I thought was impossible....the real key here is you need to treat the addict that still lives in your head long after the pills stop.....this will not magically go away on its own it takes work but with time and the progam you no longer have to be a slave to this disease you sound young you have 2 choices you can let this disease keep resefacing in your life or get help I only wish I had done it wile I was young google a N/A meeting in your area and go you got nothing to loose and a amazing life to gain........Gnarly