That's fine until it stops being funny. When that happens there is something else going on. It may be physical or psychological dependence. Physical dependence is straightforward. After a while without it things go back to normal.
Psychological dependence is different.
It is when a person believes he needs a drug. It means that life isn't quite right without it. That things don't work as they should. The need is an absence that no-one else may notice. The absence may be a parent who was never there.