DEAR ABBY: The first Christmas my future husband and I were dating, he gave me an angel ring. I asked him to take me to a bar where my best friend worked so I could show it to her. When I showed it to her, she told me her cancer had come back. I gave her the ring and told her to hang onto it, hoping it would give her the strength to fight another round. Twenty years later, she became angry with me and wanted to end the friendship. I told her that it was OK and asked her to return the ring. Abby, my entire family saw my husband give it to me. But now she has made up this story about how she had…