Here's a possible future:

• You decide to make your most important goals getting healthy and keeping your stable employment while you make plans to move to a new city.
• You go to work every day on time, no excuses. You do whatever you're being paid to do at work. You ask for help if you're not good at something. You learn how to be better at your job and you actually try.
• You take your meds as prescribed, without exception. You quit any drugs that are having an overall negative impact on your life. You resist every temptation until you're tempted less and less often and, eventually, you can't believe you were addicted for so long because you feel so good and clean and free.
• You make your health and "being on top of your shit" a priority in your life. You start eating better, exercising a bit, going to bed early, and stop spending time with people you know are a bad influence on you. You make a budget and live financially responsibly, saving some money for your move.
• Fast forward several months: you're feeling good. Your boss notices your improvement and congratulates you. If you still want to move, you thank him, but let him know that your new lifestyle has made you want to seek a different career path and you formally submit two weeks to a month notice of your intention to quit.
• You use the money you've saved to move to the place you want to live and find a new job. Your old boss gives you a good reference, which helps you get your job. Or you go back to school. Or you do whatever. But you do it feeling healthy and good and organized and its no longer a panic move.

Here's another:

• You quit your job right now. You move to a different city to run away from your problems. You make friends with people who do the same drugs as you and crash with people while you look for work. You have no money saved and you have no good references, so you take a low-paying job you don't like to make ends meat. The city is more expensive to live in, so you're constantly getting behind on your bills. You hate your job and you're stressed, so you do more drugs and say "fuck it" more often. Then you're right back where you started from, looking for another place to run away to.

The difference between these two futures is having goals (short term and long term) and seeing every single moment of every single day as an opportunity to choose to do something that gets you closer to your goals. To get yourself where you want to be in life, you have to roll up your sleeves start making the right choices, day after day. Its boring and frustrating and it takes forever. But the results are amazing and infinitely worth it.

The only things standing in your way are the excuses you make to justify your self-indulgent, bad choices. YOU are in control of your life, no one else can fix things for you, even if they wanted to. Working hard and making the right choices all the time is not rocket science. Like I said, in the beginning it will be tremendously boring and a HUGE effort of will power (which is not something you 'have' or 'do not have' - its just you forcing yourself to make the right choices), but I bet you already know when you're doing something and you think, "I shouldn't be doing this". Notice yourself making bad decisions and stop and correct. No need to beat yourself up about it and your past failures, just immediately start doing better as soon as you notice.