Darkeyes said it very well. It does get easier in time. Life will go on, though it will never be the same. Your parents and their parents went through the same things.
We used to treat each other to restaurent meals on our birthdays. Sometimes, I still eat out in honor of my parents' birthdays. Loss is a universal condition. We can't do anything to make it better, but I hope you feel a little less sad knowing we are trying to help.