Grief is a process and I think it differs from person to person as to how you grieve and how long the process takes.
When my Dad passed away, there was so much 'stuff' that had caused anger and resentment in me, I didn't really grieve until about a year had gone by.
If you happen to like ready, this is an amazing book - On Grief and Grieving by Elisabeth Kugler-Ross
And I dont know what the future is holding in store
I dont know where Im going, Im not sure where I've been
There's a spirit that guides me, a light that shines for me
My life is worth the living, I dont need to see the end.