I have fantasies of living in a gang-controlled neighborhood
Why do you have such dreams?
I feel like I don't fit into this high-class society
I understand, but It's not good to have fantasies about living in a bad neighborhood, because that is a dangerous place to be. You should learn to love where you live, or find somewhere that you will truly fit into.
I want to live in a bad neighborhood so I can be popular and look tough.
The neighborhood you live in will not change people's perceptions of you.  If anything, you will be even more out of place in a bad neighborhood, and will appear weak as a result.  I would advise that you just find the good in your current locale, because you are accepted there.