The need to flee?

I've been depressed before, but since the first severe time I've been depressed, my depression has been... fickle. Sometimes it's real bad and I feel like **** and what not, but most of the time, even in my depression I'm able to crack a joke (it's just more likely to be cynical and/or tasteless). Other times, it's not so bad, or it's a mere back drop on my otherwise happy life. I'm bound for college, I've got a loving family. I live with my mom, I'm an only child whose never met his father (whether that's relevant, I've no idea). Anyways, lately I've felt like ****, close to the worse it's ever been. The sudden loss of a friendship that was slightly more than a friendship is what set it off, the fact that I can't forget it, or get away from people related to it perpetuate it. I want to get away, I feel the need to flee somewhere, probably since fighting isn't working. But I don't have a car of my own, road trip not an option (otherwise I might jump on that idea). I'm at a loss, ideas?