Today was a really bad day for me and my family because of my mood swings, what should i do ?

I woke up today feeling like not like myself and I felt depressed right from when i woke up. I had been giving my parents problems with my mood swings and they said they are really tired of it. They said they want to file a paper in the local magistrate to remove me from their house. I'm 19 years old and I still live with them, I don't know how to drive and I can't afford a place of my own. I graduated from high school June 2009 and I was taking a break by staying home a year. I feel upset also because I can't find a girl on my own, whenever on the days i feel depressed my troubles getting a girlfriend always surface and makes me feel depressed. Someone who knew me from high school sent a message to my myspace on a fake new account dissing me by calling me gay. That person said when a guy who is my age who doesn't have a girlfriend, it automatically means he's gay. They said every guy at my age has dated girls and that something is wrong with me. No girls likes me so how can i date a girl when no one likes me. I know I'm Straight because I'm only into girls. What should I do ??? Can anyone please help me out ?? The medications I'm on are not working and i'm planning to go back to my family doctor really soon.