Sadness beyond belief

I'm extremely depressed right now because i had to put my dog to sleep a couple of days ago.......I wish i didn't have to, but she was old and she was in misery....I'm going to miss her so much.... She was the last of my best friends that i could talk to and tell all of my problems and worries to and not get laughed at or criticized for what i said....... I've only had two friends like that.... My grandfather on my mother's side and my dog....... My grandfather died when i was a little boy.... i still cry at the memory of him..... I will do the same for my dog now..... I loved them both and i still do...... But as my grandfather used to tell me..... i have to move on... i can't hold on to the past and i have to let it go...... But that has proved to be very hard.... I wish that i had someone else that i could talk to..... but i don't......