I can only advise you from my own personal experience, i lost my dear cat Sooti coming up 5years next year, in tragic way, and my heart was aching just like your's, i suffered depression i never knew i could experience from loosing my beloved kitty,it was just awful and i know exactly how you are feeling, i just have to say when i finally decided to take another kitty, my darling lil Lexie, it was the best thing i ever did, she brought back the joy in my heart,and filled the empty void that sooti left,she did not by any means replace him, but uncanny as it is she is so like him, a gentle loving kitty, a real companion, i was not even going to adopt a kitty that looked anything like him, it would hurt to much, he was pure black, and if you look below you will see my lil lexie, who was hiding under a blanket in a cage at the cat shelter, she looked up at me with her beautiful yellow eyes,and all i could say to hubby was , oh my gosh she looks just like sooti,apart from her being a girl and a little white dash on her chest.

You can only do what you feel is right in your heart, but don't think by getting another puppy, that it any way takes away the love you had for emerson, he will always be in your heart forever,if i were you i would open my heart again and take the risk and take that puppy and give it all the wonderful love you obviously have to give.

P.S just wanted to add you will still grieve for you dear emerson, but i will help ease the pain some, believe me,it still hurts but i in hindsight wish i had not waited so long to adopt lexie, but then i am glad i did too,because i would have missed out on the best kitty in the world,hope that makes some sense.