{{{ tomboy~! }}} i know what you mean,, they give us courage, strength and safety, as well as love.
it's not a terrible thing to get another dog. it doesn't mean you loved this one any less, it's not disloyal. look for a dog who has already had her obedience training, maybe one who didn't make it as an "Aide Dog" ?? she would need the kind of good home and loving person you can provide~!
remember we are here to listen, grief can take a long time to subside... the memories never go away~