How can I improve my current lifestyle and relationship status?

[maveric]

I am facing my 22nd birthday and my life is in complete turmoil. I have lived my life in my own shadow, so-to-speak. I wasn't excessively disciplined as a child, but I was shown right from wrong assertively in a tough-love kinda way. I just need some words of wisdom, perhaps from an older person, someone successful. Basically I am in a relationship that I do not want to be in and feel trapped. I have allowed myself to cut off literally the better part of most of my family to stay with this girl. I have burned my bridges with my parents and lost my job trying to be there for this girl who is constantly depressed and even though she is also 21, she still cuts herself. I am not sure if she does that for attention or to "block out pain" or whatever, but I am really being pushed right out the door. I feel like Im trapped, I don't want to leave her because I am SO terribly afraid of her doing something to herself that would be more than just a cut. We have been together for 7 and a half months, the first 2 were the only enjoyable ones the whole time (honeymooning?). But I really feel like it has been a complete waste of my time and emotions. We moved into the relationship way too fast and we didn't even know each other when it happened, now it seems like I hate her because I know her as much as I do (which really isn't much, I don't know what her favorite movies are, what her color is, what songs she likes, nothing...). We live together and it seems like she is trying to be the dictator of my life. I haven't talked to any of my own friends since the first month we were together and my family don't like that I am still with her. I really do not know what to do because like I said, I lost my job and am currently income-less, I cant even look for a job without her crying and throwing a temper tantrum because she doesn't want to be without me for even long enough to take the browns to the superbowl. I mean I am really lost and need some guidance from a person who has been in a similar situation. Please, please, PLEASE! How do I go about fixing my life???