Take it from someone who dropped out of college that it's a bad idea. No one takes dropouts seriously unless you happen to be a genius.
The only jobs I can get are lousy driving positions. Trust me, don't do it.
In fact, I'm considering re-enrolling, but I still have the same mental health issues.
And I swear this is not a plug but I heard of this place on the radio, it's based in Nyc and is non-residential. If you have the money I would consider it:
Collegereentry.org