This is my experienc with opiate addiction.
You are blind to it for the most part, even if you know you are an addict.
You spend 90% of your day thinking about getting that drug, and then if you are lucky, you get high and are allowed a few moments of gracious mental clarity, in which you pretty much funtion like a normal person.
If you are lucky, you have enough financial income to support your habit, but after awhile, you habit will most likely overcome your income. At this point, many people begin to lie, cheat, steal, and manipulate their own and other lives to get the drug.. This doesnt mean whoring yourself, or robbing stereo equipment, but it can come to that.. Usually you live your life full of risk, driving ungodly distances to score, risking getting caught rummaging thru peoples pills, loaning and pawning your shit, and making all sorts of false promises.
Sacrificing any healthy relationship with your parents, nonaddict and addict friends, and romances for whichever chemical gets your endorphins back into place for a few hours.
The magic comes in when you realise your life is out of control, that you are a totally different person, and that you can never be normal like others, sober and addicted. And you still continue to use. You keep going cuz the drugs you started using habitually to fill
whatever void in your life has only dug and scraped it out, leaving it bigger than when you started. Nothing now works, but the drug. The drug has rewired your brain and body to the point where, like food, water, and air, you need it to feel ok. Without the drug, you become dull, lifeless, depressed, sick(if on opiates), and this whole resentment for life fucking you over comes about. So you use to make that feeling go away as well.
As far as phsyical addiction.. That is half the battle. Pretty much, you can keep getting high and living in a happy, but total fantasy world, or you can quit, get sick with what feels like mono, food poisoning, and severe depression, knowing the whole time that you could be cured in 1 minute with $20.
IMO, alot of people fall into this idea that addiction is glamorous, because it is part of some rebellious counterculture.. Truley, it is just a sign that someone is sick in the head, and are using the only way out they can find. The nature of the drug, and the drugs withdrawls leaves you so apathetic that you can no longer imagine any other options that could maybe make you feel better.
All of this is what I have found to be the case with 75% of true opiate addicts, not casual users. Then there are always exceptions.. Most people begin using thinking that they will be the exception, but almost all the time, tehy are completely consumed, and only realise it when its too late.. Kinda like me!!
Opiates are like a Pandora's Box.. Beautiful packaging that makes it seem crazy not to mess with, but once opened, things are unleased that can never be put back into their place.