Hey thanks for replying again, I know you speak from experience and I really appreciate your input but there are a few things I have to disagree with.
By that logic, I'm also addicted to chocolate, the Internet and fingering myself.
Yes, you are (probably, seeing as you seem to be admitting to a compulsion), they are just different kinds of addictions. Although I have to say the fingering is probably harmless and will slow down naturally over the years :D
I'm certainly not. Just because I enjoy something doesn't mean I'm addicted to it. As I pointed out already, there are a lot of things in life that I would find difficult to live without. It doesn't mean I'm addicted to anything. To me, addiction put simply is when you continue to engage in something despite the severe adverse consequences it has on your life. Heroin hadn't had any severe consequences for me thus far, so why would I see any reason to quit? I can't quit just because someone else wants me to.
No, enjoyment doesn't equal addiction, but things which plug into the reward system of the brain lead to addiction with repeated activation. This is just the way the brain works.
I don't quitting will be difficult, I gave in to temptation a couple of days ago after months of not using. The only bit about it that I regret is the fact that I got caught. I was never physically addicted to heroin so there isn't a physiological aspect to my use at all.
See, the psychological aspect of addiction only exists because of the underlying physiological response. Of course there is a physiological aspect to your use, unless you're not actually absorbing the drug

And yeah it's possible to be addicted to things even though you're not using them all the time. Addictions, and addicts, vary in terms of how controllable they are, how able we are to endure not acting on the compulsion, how frequently something must be repeated before it becomes compulsive, how long the cycle of compulsion takes to complete, how much it may be
stretched without breaking, how much or little stimulus is required to maintain the addiction, etc.
There are actually at least two physiological habituating mechanisms involved in drug addiction:
- behaviour / reward system - you do something it feels good, brain learns to repeat the behaviour
- tolerance / dependence - you do something repeatedly, you get used to it, you need it to "feel OK"
And then there are at least two psychological elements - the struggle to control reward-driven behaviour, which is in itself habituating! (oh how I enjoy repeatedly freeing myself from this terrible dependence and sinking myself right back in it) and our psychological inability to endure the effects caused when we remove a stimulus to which we are tolerant/dependent (I see these as two sides of the same coin, but I can see how dependence might be spun off as yet a third/sixth physiological and psychological mechanism at work keeping you doing something for no rational end. And then there are the rational ends which feed these systems.)
It's quite complicated, sneaky shit and you're almost certainly not immune

although it starts off fairly simple, and gets more complicated and sneaky the longer your habit
and habits go on for.
You have an oversimplified (actually Julie is right, it's
over-complicated, cos you've defined it to have more features than it actually has, so you can say you don't have it; but that's not to say the mechanisms aren't more complicated than you might think) view of addiction. Addiction is not "repeatedly does something despite severe adverse consequences", that's more like "problematic use", and/or "self-destruction", you can be addicted without any actual grave consequences. Just like me, to various things.