Cookiebaker, my advice is simply to do as your heart tells you. I am sure Rilla misses Azure and if you feel that it will help her and you then get her a little friend. If however, you don`t feel ready then wait for if and when you do. I am sure Rilla will be okay, she still has you and I am sure you interact with her a lot and that is the most important thing for a single bird. I believe whichever way you choose will show a loving heart never a selfish one.

hugs