Giving up

Well I gave up today.  Girlfriend is a life long drug addict and nothing I can do to fix that.   I made a promise to myself and God not to leave her any worse than I found her if things went bad.  I don't know how to keep that promise anymore.  She lies constantly to get what she wants and I can;t believe a word she says.  She lies so much she no longer knows the difference, between truth and lies, and the real reality and the one she fabricated.  She contributes almost nothing financially and while I can pay the rent, I can't afford the utilities and my gas is way overdue on a shut-off notice.  My car has a coolant leak, I keep filling with water, but it's winter and I am afraid it will freeze.  I can't afford to keep buyinf anti-freeze.   It's due for inspection next month, the last slap and stick is expiring.  The list goes on, things I put out of my head so I can get through the day.  I need to keep going to work to pay what bills I can pay.   I don't know what more I can do.  I am lost.  I give up.  There is not even any real food in the house.  I am hungry.  I am thirsty.  I am going to bed so I can be up for work.