I want to stop using an illegal substance that is taking every penny of my money, making me look old and haggered, and making me unreliable, untrustworthy, unsociable, and unapproachable, but it is so highly addictive i cant

Find your nearest NA meeting and go to it.

Oh I found this on the internet also, I don't know if it'll help but it seems pretty good. And you've already taken step 1 and 2 :)

Instructions

Step 1:
Admit you have a problem. Since denial is the main symptom of addiction, admitting there is a problem is the first step toward overcoming an addiction.
Step 2:
Admit that you cannot recover from your addiction by yourself or by your own willpower. Addiction is a paradox. It may seem like the answer is to control and use your own willpower to stop the addiction; however, the need to control sets the emotions in place that lead to the next relapse.
Step 3:
Find a therapist or psychologist that deals with your specific addiction. Many doctors and therapists use behavior modification techniques, which help addicts recognize and address the physical and emotional aspects to addiction.
Step 4:
Start going to appropriate 12-step meetings to overcome an addiction. Twelve-step programs have high success rates for those who make them an everyday and integral part of their lives. Seeing a therapist and going to 12-step meetings together helps addicts increase their odds of overcoming an addiction.
Step 5:
Take a holistic approach to your addiction by addressing underlying emotional issues that are relevant to your addiction. Most people who suffer from addictions come from dysfunctional families where their basic needs---such as having a loving and nurturing environment---as children were not met. Recognizing and addressing childhood issues from an adult perspective can help alleviate many of the unconscious desires to act out inappropriately through addictive behavior to assuage unconscious feelings of resentment and fear.
Step 6:
Replace the addiction with a positive behavior. Giving up an addiction creates a vacuum. It is important to replace addictive behavior with something that promotes positive and healthy attitudes, especially toward building self-esteem.
Step 7:
Become willing to let go of situations, social activities and friends that encourage the use of your drug of choice to overcome an addiction.
Step 8:
Learn to live life in the moment. It's hard to give up an addiction if you're thinking about how impossible it will be to quit the addiction forever; however, giving up your addiction for this one moment in time will seem more plausible and more realistic.

Resources

The Addiction Recovery Guide
12Step.org

From what I've learned it's pretty hard (if not impossible) to quit without some form of outside help. Look for different options of proffesional health and talk to someone! Don't let this problem ruin your life..... your better than that, I'm sure :)