This is a state of mind I know too intimately, unfortunately.
From one soul in pain to another, I feel the need to reiterate the most frequently told and most honest piece of advice anyone has ever received. I find that Shane Koyczan does a beautiful job of restating the old, worn out truth,
"Be forgiving. Living with the burden of anger is not living. Giving your focus to wrath will leave your entire self absent of what you need. Love and hate are beasts and the one that grows is the one you feed."
It's easier said than done, I know. It's an aspect of myself that I am constantly working on.