From a college drop-out
I left college and didn't regret it, I'm so much happier 3 years after. BUT I had a plan where I wanted to get and I believed I had possesed the skills(to make not so bad money in the meantime, to survive before I setup my business...). Anyway, the school was depression for me(learning what I didn't like, where I wasn't good at too), what I'm doing now is the exact opposite. I was thinking at that time about leaving for ~3-4 months before I did it.
But, if you don't have something close to clear plan and faith that you will make it happen(and some skills to make it happen), finish the school better.