addiction is extremely complicated; for example, i became psychologically (mentally) addicted to opiates after 3-4 times of using but i didnt get physical dependence ways down the road. first you are messing with codeine, then hydrocodone and oxycodone, then you are shooting up H in a bathroom stall..
planning out your use is a sure way to self-sabotage yourself. keep active in your life, and randomly abuse opiates. like seriously, once you start thinking about when and how you will take your drugs and planning out days to use, you are on a sure way to fuck yourself..
i am an addict, and i can tell yu your use will ALWAYS catch up with you. using opiates might not seem like they have consequences in a short term perspective, but you have to play the movie out. everytime you use, you increase the chance of becoming addicted. i really wish i never used any drugs, i have had soo much shit happen to me in the past year, it seems soo surreal. rehabs, being homeless, contracting hepatitis, being arrested, getting kicked off suboxone for weeds, ect ect.... at the time when i was using, i felt invincible and using opiates like oxycodone and heroin did not seem to come with any baggage and opiates actually seemed to increase my quality of life, boy was i soooo naive!!! my life was crumblinh around me and i was too doped up to even notice. eventually, it caught up to me, and hit me like a ton of bricks!!!
i started off like you, using codeine here and there, not really caring about it, but eventually as i used more and more, opiates became a part of my life. in the begginig, i mean for like 2-3 years, i was good, or it seemed like everything was OK, life seemed better than OK. codeine eventually wasnt enough and moved to hydro/oxy (vicodin/percocet) and maybe my parents and GF bitched at me, but it wasnt a big deal. then i found roxis (30mg IR oxycodone) and it was much easier to take larger doses and get more fucked up than percocet. shit bcame a little unstable, family and GF always on my ass, but i classified it as more of an annoying thing than a real problem. after using and using and using and then eventually i moved to east coast powder heroin; i traded famly and friends and my life to get high. then shit snowballed and i was on the streets, stealing and doing sketchy shit...
man, its not worth it!!! i can tell you, be very careful with opiates!! everyone starts out with innocent codeine, but almost everyone upgrades eventually. like i said, dont even think about it in your daily life, just do it when it comes up, but also increasing the time between use decreases the proabability of becoming a full blown addict.
very important!!! a study on mice and rats showed that if the animal was in an enriching environment with extrinsic and intrinsic rewards such as getting food at the end of a maze, ect.. were much much lless likely to admin heroin or other drugs. the mice who sat around and didnt do shit were the ones who constantly shot themselves up and became dependent. learn from the mice!!! enrich your life with activites such as sports, a girlfriend/boyfriend/partner, a job, school , hobbies, ect and you will be much less likely to become an addict!~!!!
to answer your question, people usually develop physical dependency after 3-4 weeks of a daily use, but liek i said psychological addiction can occur on the first use, and mental addiction is what screws you in the long run. sure the physcial WD sucks dick! but once you get over those, you wll be left craving some opiates and stll be mentally dependent.
\
good luck!! i wish you the best!!