I have done fasts before. I used to do them about once a year for five days. It is always a beautiful time. Every time I get a hunger pain, I remember that God is my sustenance. I've gotten answers to many prayers during those times.
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This was the verse that came to my mind also. Perfect love drives out fear. I didn't become a Christian because I was fearful. I became a Christian because I realized that God really loves me, and I wanted to follow Him.
Have you mentioned to anyone that you're thinking of moving out? Maybe if you told them you are apartment-hunting, that might shock them into thinking about how they will manage without you. It sounds like they take you for granted.
I agree with san54, too, that a Christian counselor could help...