Oh that is so sad
Poor little baby! Bentley is actually better when left alone since we got Bitsy, but he still gets really depressed right before I/we leave the house. He KNOWS when we are getting ready to leave and the pouting starts long before! We've never left him or her alone for even more than a few hours though and when we get back you'd think we had left them alone for days
It's hard for me to leave even that long because I feel sorry for them so I can only imagine how you feel. I think a second dog
is a great idea or a pet sitter might help, but the truth is that no one will replace his mommy!