Anxiety and depression

Hi all Putting a new topic out there, & would like your comments if you've experienced similar. My youngest sister had breast implant augmentation surgery for aesthetic reasons. Later I was diagnosed with breast cancer. She very rarely gets in touch. Granted, we don't agree on much, but I feel sad that she now calls us "estranged". Remembering printed information I received about some people, including family, not being able to deal with us having cancer, it may be guilt, fear or resentment, or even need all of the above. She seems to have the need to copy things I say, for oneupmanship,or whatever, and it saddens and frustrates me. Does anyone else have this trouble with family members or close fronded? If so, how do you deal with it? Actually, when we are together, outsiders wouldn't know. She can be very thoughtful and understanding at times. I wonder whether there might be a personality disorder there. Love to hear your thoughts. Live and hugs to all Kathleen xxxxx