Hi SingleGirl,
It looks like I'm newer here than you, and I've already gotten the feeling that you're always welcome and there will always be someone here who is willing to hear your thoughts and emotions.
You are facing a rather horrible situation, so it's no surprise that you're depressed. First, I am sending you my love and support
((((((((((SingleGirl))))))))))
I don't even know what to say about your situation other than it absolutely sucks... that was rather uncalled for for your best friend to call you "selfish" for trying to avoid an emotionally and financially draining family.
Pragmatically speaking, have you considered (or are you currently seeing) a therapist? Therapy can be costly without insurance, so I hope you have decent coverage. Otherwise, you may want to talk to your local Health and Human Services department and ask about getting unemployment assistance and hopefully some medical coverage.
Further, is there anywhere nearby where you can 'retreat' (a friend's or whatnot)? Getting away for a while may give you the time and strength to try to get a handle on all the problems your facing right now and allow you to figure out some solutions.
That's just some immediate advice. Be sure to take care of yourself, rest, and be kind and loving to yourself. Keep posting, and we will try our best to get you through this and figure things out for th elong run.
Much love,
J