Hey, it's okay to mourn. Loss of any kind is very painful and emtional. From the sounds of it, you gave her a great home and plenty of love and attention. If dogs could speak, she'd would have probably said, "thanks for the wonderful times." And that is what will help you in the days ahead when you are lonely and missing her, remembering all the good times that made your bond so special.
As one who has been there, I'll be thinking of you and praying for you.