I echo the sentiments of fellow RU's posting above, and my heart truly goes out to you. I'm sure most of us know the pain that you feel and I fully understand why you feel tearful all the time. They attatch to our hearts and when they leave, the pain that we have left is a constant reminder. What you and your family gave Cuthy was a world that he deserved and enjoyed and lived to the fullest, safe in the love and care that you gave him, and he had the most wonderful companiionship with Dillon. I'm sure Dillon is also feeling the loss - like you, I believe that animals form a simbient bond and they have to deal with the grieving as we do.
I would also say that finding a new companion for Dillon is a positive step forward and one that you should lead with your heart. The right rabbit will find you and I hope very much that you can find a new companion for Dillon. Sending you hugs and you are in my thoughts. xx