Family, friends, therapist - talk to them if you have 'em. Get really into your hobbies or find new ones. Health and fitness, whatever you can. Find the things that give you comfort and do those. Do everything you can to invest in yourself. Draw open the curtains. Open the windows. Get outside to green spaces. Heal before you get back out there. All of your anger, hurt and despair should be focused into improving you. Do not seek comfort in drugs or alcohol. You will have to acknowledge these feelings. Its a little easier at first if you just keep busy. Its going to suck. It will get better, slowly. But you will come out the other side better if you do all of these things.