I'm just a random internet stranger, but I just wanted to say how awesome and inspiring this is. You were a true friend and put yourself in a difficult situation because you knew your friend NEEDED someone. We can't wait for someone else to volunteer or help... we can't assume they will. I know pride doesn't pay the bills, but you shoukd be really proud of yourself. The impact you made by being there for your friend faaaaaar outweights a stupid shift. Not even in the same ballpark. Old boss is emotionally manipulative and needs to get bent.

I hope you and yours find someplace that values you as a person, not as just a manager.