That is so hard, anniversaries like this one are tough. Funny how a dog becomes so much a part of the family, and part of your life. To be honest with you, I can't believe it's been a years. It seems just like yesterday that you had to put her down. If another dog is in the future, it will be when the time is right, for now just enjoy being able to travel more easily.
You have some great memories, and in the end that is what really counts!