Talk with someone who's been through the experience. Consider joining a support group. Keeping a journal can be a healthy outlet. Be kind to yourself. Eat properly and exercise.
Physical activity releases stress.
Do not let yourself be put on a pedestal by those who praise your courage. Read about grief. Professionals and those who have experienced loss have a lot to share. This keeps you from dwelling too much on yourself. Know that God is with you in your pain and loneliness and will give you strength.