My heart aches for you...
because I know the feeling only to well. We lost our 10 1/2 year old Boxer Faithy this summer and it was one of the saddest times in my life and still, there isn't a day that goes by that I don't think of her and that sweet silver face.
Your not crazy for continuing to do all the things you've been so accustomed to do, it's old habits and all great ones. I also didn't wash Faithy's bed for 2 months after she was gone and for the same reasons that you mentioned. It kept a part of her with us, little bits of fur and her scent, very hard things to let go of when your heart aches for them.
Just try and find strength in knowing that so many people are keeping you in their thoughts and in time you'll think of her with a smile instead of tears, well tears sometimes. She'll be forever in your heart.
Rest Peacefully Sweet Blizzy. (((Hugs)))