Reading these kind of threads is always upsetting: trust me, new members, new users and you guys lurking anonymously - the odds of you being able to use opiates and not develop an addiction of some description are infinitesimally small. Telling yourself you won't become an addict is as arrogant as it gets, and you won't realise that until it's too late. I, and millions of others, said exactly the same thing. "Oh, it's only 90mg of codeine, once a fortnight, I'm fine", which becomes, "It's only 150mg of codeine every week or so, but it's only codeine, I won't become an addict", which leads to the phrase that haunts me every single day, "I've got this under control". The second you utter those words it is over, you have psychologically lied to yourself, as soon as you argue control with yourself: you have lost all of it.
No matter how long you've been at it, how little you take, how infrequently you take them, or the old chestnut; "I don't have the money/frequent access for it to become an addiction". You will find the cash and you will find a way to get your gear, no matter what.
If you're not already an addict, back the fuck away now. You are not special, you are not invincible, you don't have some kind of super human physiology that allows you to avoid addiction - we all thought we did.