Coz the loss of a best friend, the love of ones life, ones parents or any other person from which we been so close, is very hard to accept.
But, we have to one day. First by accepting the fact that the lovely one left us and will never come back, anyway how much tears we will pour...
Secondly by let the person go quietly, did this person would see us crying and stoping our life coz this person is gone? Or this person would see us continue our life and living stuff than this person didn't had the time to living?
Then, always remember that those who leave us, don't really left. They are always around us or somewhere up there keeping an eye on us, living through us and giving us some signs sometimes.
Did you ever stoped to crying and then received some signs from the other side? A strange bug on your computer, a dream, crossing a lot something who represented your love, some physical sensations like a caress, a touching a whisper?
All this are a lot of different proves that the person is always around you and say to you "Hey! I'm OK! Be OK too!".
Learn to let them go and to living for them on another way, by doing stuff from which they should be proud that you accomplished...
Never nobody die really and deads are all around us keeping always an eye on us and leading us.
And then don't forget that one day, it will be your turn to join them. We are never separated forever but for a period and this period is called life!