Not to long ago, you posted in Ferret's emigration thread that you would be interested in emigrating. That might be your best option. Well, you don't necessarily need to change country, but maybe move to a different state.

A move would mean the possibility to reinvent yourself and to separate yourself from people who put you or keep you in a certain category.

Maybe find a place near a park, so you can go roller blading or jogging, or just hanging out in the park to read and listen to music and meet the regulars who do the same and make non-sketchy friends.

Whatever you chose to do, good luck with it.

Oh and why do you work in a grocery store? You would seem perfect as a record store clerk. :)

EDIT: Stay true to yourself while reinventing yourself.

Your past is unfortunate, but as others have attested to not so rare. Young children diagnosed with ADD/ADHD are often said to be intelligent. I was diagnosed with ADHD and they had me on drugs from 2nd Grade. Later I was diagnosed with OCD. They had me on drugs until I was 16 when I rejected them because I could start to think for myself.

In my opinion part of the problem is how the diagnoses of AD(H)D inevitably leads to mind altering medication. This altering of an individuals emotions is not well understood, the long term side effects have been noted to be detrimental to emotional health. I always had an aversion to these drugs, from the first week I started taking them. Because the drugs weren't me, they were what people wanted me to be. As children we don't have a choice and worse yet the parents think this is what is best for our future. I'd like to live my life over again without the drugs because I think they really made me anti-social. In some cases, such as yours that anti-social behavior may have led to your "loner" state. Everyone handles it a little differently.

Fortunately my parents were and are my biggest supporters. They were great role models and always helped me when I asked. If it wasn't for their support I could have easily tripped up and headed down a worse path. With their support I completed university at the top of my class (though I too stopped caring about what I enjoyed and have been unemployed for a year). It sounds as if not only weren't your parents supportive but they were actually anti-supportive. Abuse is a leading cause of psychological health problems later in life.

I can tell you to focus on your emotional center. You need to listen to what it is telling your conscious mind, because it dictates every action you commit.

I agree with Dogs Rule, relocation is a very effective way of altering your emotional center. If you go into the move with some goals in mind it can really help you to focus on them. Obviously it shouldn't be taken lightly and be well planned with a good contingency plan.

If you really want change, it's going to be a long process. The emotional center of a human is very hard to alter. It takes vigilance, perseverance, and most importantly time. You can obviously make immediate changes to your environment, which I'd suggest (relocation and more meaningful job). However, emotionally it will probably take at least 5 years to become fully healthy. You shouldn't be put off by the time frame. You'll start noticing changes in the first year, and it's this growth that will keep you motivated to become happier and healthier.