This is a stage of life that most everyone goes through.
No one can answer who you are and what you were made to do better than yourself.
Look at your horiscope and zodiac signs, what do they say about you (with a grain of salt), are they true? Take personality tests like the Myers-Briggs, it is well worth the effort. Take all of these things into account and figure out what are your weaknesses, strengths, what do you need, love, crave, what do you hate, etc, etc.
- And then use it to your advantage
Once you have figured out who you are and how you function, you can use that information to help you manipulate yourself for a better lifestyle - for example, how to motivate yourself, how to keep a better budget, how to stay on track with a diet, how to be better disciplined, etc, etc.
- Figure out what you like to do
There is one more crucial work step, you need to figure out what you like to do. A good place to start is (skill or job) aptitude tests. Think about the courses you took and jobs you had, what did you like, what didn't you like, and why. Is there anything where you felt "Oh yeah, I was so MADE to do this!" ?
- Figure out what you would like to do with yourself
Now, a disclaimer here, I do not believe that there is exactly one predestination in a person's life. That is, I don't believe that a person must find the exact right job, vehicle, spouse, pet, ... and then live happily ever after with no work/labor involved. No, instead I believe that a person can choose those things, and that there are some choices that are good, some that are bad, but there is no "perfect happily ever after choice".
With that in mind, I think that you should sit down and take a look at your life. Are you satisfied with what you have been doing? Do you feel content and happy with your life? I believe that you have the power to do just about anything that you want to do with your life (well, except maybe rule the Earth). While thinking about what you like to do and are good at doing from the previous, start to formulate a plan to do those things. Do you need to switch jobs? Go to college?
Life is much too short to be terribly miserable. You have the power to change it, and attain your goals.