learn to let go

I have been in a 5 year marriage that fell apart last year. Could not quite let go of the past yet. At times it still makes me cry and feel lonely. But is this really worth pondering about. I need to learn to let go and move on. I tried to ignore it but that does not help at all cause how can you ignore the fact especially when you go to bed alone. I am letting time pass me by and maybe it will let me forget and finally forgive myself about all that has happened.