A loss of tragedy of any type needs a time of grieving, a time of healing, and a return to life as best as we are able. We each process these things in different ways.
When I went through a divorce 11 years ago, after 26 years of marriage, first, I relied heavily on my faith in Christ and spent a lot of time in prayer and Bible study. I found that shooting my bow and hunting, while at that time more of a chore than a pleasure, helped draw me back to the reality of life. There are things I enjoy, life will continue, some areas of my life were still the same.
For me, the turning point was when I considered that what happened, happened, it hurt, I didn't like it, but I had a choice to make: I could continue to grieve, or like a Phoenix rising from the ashes, I could choose to rise up and make a new life. It took work, but it did work.
Today, I am far happier, far more satisfied, and have a better understanding and appreciation for life than I had - and a wonderful wife! I wouldn't ask to go back through what I did then, but I did grow through the experience.
We each handle grief in our own way and on our own timetable. I know it sounds trite and cold, but it won't always be like this.