Keeping a Heart of Gratitude in the Midst of Hostility

Life has been more of a prison to me lately. I have been held captive by my anger and feelings of insecurity. The former is a means of defense against constant criticism, blame and disrespect. I wish to untangle myself but just as it is painful to leave the source of such anger and insecurities literally, so it is to let go of my anger. If I let go, then what? Would I be protected from further hurt?

In this state, it is very much difficult to be grateful. The only thing that has kept me grounded and not to let everything blow up are my children. How can people stay grateful in situations like this?