At what point does drug abuse rule your life?

When that is all you can do or think about. When you feel like you cant go a day without drugs. When it starts to ruin friendships and relationships. I have struggled before with this topic and when you finally realize that it is taking over, that is usually when you want to do something about it, but it took me a lot longer to get over it than just realizing it. It took until i hit rock bottom and that is when I decided to get over the fact that i don't need drugs to do things or to survive.