cocaine abuse

What Can You Tell Me About Cocaine Addiction?

Question by Alice in Wonderland: what can you tell me about cocaine addiction?
I guess I grew up fairly sheltered because I know close to nothing about drug addiction. I know that drugs are bad and that they almost always destroy your life in one way or another if you don’t stop and get the right help. What I want to know are the signs and ways to tell if someone has done or is high on cocaine. Someone I really care about told me they do it. And that they want to stop. And that they do it cause they like it but almost immediately after doing it they feel horrible – depressed. Said they feel like they have no self-control over it.