I am so happy to hear of the love and support that you and your beloved Abby gave to each other. She loved only one person and that was you.
Gaining the trust of a shy and traumatized cat is no small thing, she obviously recognized what a wonderful human being you are, and decided she would be safe with you.

I know how you miss her. You will always miss her. Yet, one day another little creature will need you, and I hope that you will take it into your heart and love it as uniquely and completely as you and Abby did each other.
Not as a replacement for her, but in addition to.

Best always.
Lois