I know exactly how you must be feeling. I lost my little Yorkie in June 2004. But I got another one straight away. People say that you should grieve for your lost pet but nothing will make you feel better than getting another little bundle of mischief. When you are running around with a cloth and a bottle of Dettol, you will soon start to feel better !
I got my present Yorkie 24 hours after the loss of my previous one. I haven't forgotten him, as his photo is on my fridge. Nothing will bring back Tilly but you can divert your love to your new dog and you will soon feel better....believe me, it works !