Dear
Welcome to HCM
We understand your concerns
I went through your details. You guessed it correct. Person with
heart disease, or for that matter any life threatening disease or circumstances, go through a depressive phase in their life. Depressed people are always self centered after some time. In the initial
depression stages, they could show appreciation for others, but it stops lately. They always want to be left alone and they usually become angry towards their caregivers because they want the caregiver to stay away. Not because they don't like the caregiver, because they don't want to trouble the caregiver (they think it is of no use caring them).
You are doing great. Talk to her, motivate her, be with her. I suggest these are your duties and understanding more about your friends problems, should help you regain your belief.
If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute detail possible.
Hope this answers your query. Further clarifications are welcome.
Good luck. Take care.