Being addicted to a drug means you need the drug to function or you will go into withdrawals and be very sick without it.
When you feel like you NEED this drug, you may have an addiction problem. You HAVE to have it, EVERY DAY. Alcoholics have to have a drink every day. Shopoholics have buy things constantly to get a rush from their purchases. Its this constant urge nagging at you and when it is something as strong as heroine or crack, cocaine - the urge is also a physical one. And if you don't get it, you have physical withdrawal symptoms.
It means that you have conditioned yourself and rely on whatever source it is to maintain a type of normalacy by which it has created.Its no longer a want its a need.
It means you can't stop using drugs and you use all your money on it
You can't stop using... You have withdraws..