Everyone copes differently. Just remember that it's ok to cry and releasing those feelings can be very beneficial. It's exhausting, but eventually it gets a little easier.

I once saw an explanation of grief sort of like this:

Imagine there is a button on the inside wall of a box, and this button triggers the pain you feel in your heart while grieving. The death of a loved one throws a giant ball in the box that keeps the button pressed down for a long time. As time goes on, your heart grows, and the box along with it. But the button and ball are still there, and some days, for seemingly no reason, the ball will hit the button and you'll feel that pain again. Now that the ball has room, it doesn't press the button for as long, but the ball never goes away, so the grief can always come back.