['My dog passed away a few weeks ago. She was 12. I really miss her.', 'Oh wow!  My dog passed away recently too so I can relate to your pain.  I am so sorry for your loss', 'Thanks, and to you too. They really are our best friends.']
Most definetly she was my constant companion.  It will hopefully get easier for us each day
My dog passed away a few weeks ago. She was 12. I really miss her.