What is the point?

I seem to be in a randomly depressed mood today where I'm having problems seeing the point to anything.

OK, I've finally got my ass in gear and moved away from home, I've got a job, I'm relatively self-sufficient, Now what?
I go to work, I come home, I go to bed, then get up and go to work again. On my days off I do housework and shout at Bart a lot. Great. I wonder if this is all there ever will be to life and this depresses me a bit. OK, I know I could get more out of my life if I got off my arse and looked for interesting stuff to do but I struggle with motivation.

I'm sorry this is such a whinging, self-pitying post but I needed to get it off my chest.

Don't know why I'm feeling like this, maybe it's a combination of PMT and Pre-Birthday depression. Also, it's Sunday, which doesn't help.