So - here's a few questions as a reality check. Take your time.

Are you using more drugs or alcohol than you used to get the same effect?
Are you using drugs or alcohol more frequently than you used to?
Do you use drugs or drink alcohol on your own?
Do you lie about your using - i.e. how much, how often etc. - to your family or friends?
Has your drug or alcohol use ever caused you any money problems?  Problems at work?
Do you regularly take more drugs or alcohol than you originally intended?
Have any of your family or friends voiced concern about your drug use or drinking?
Have you ever made any effort to cut down or stop your drug or alcohol use?   Did it fail?
Are you using drugs or drinking alcohol more or less continuously now?
Do you think you have a drug problem?

If you've answered "yes" to ANY of these questions - then it's quite likely that you're dependent on drugs or alcohol.  Don't despair !   - accepting this is the first step towards finding a solution.

But now - it's MAKE UP YOUR MIND TIME.  - It's up to you - no-one else can make this decision. Do you want your life to carry on like this?  Or . . .