This thread is very apt as I am just in the process of tailing off an old friendship. I have considered posting on GN about it but I was too upset about it all.
We were next door neighbours and kept the friendship up since we moved away almost 30 years ago. We still did a lot together, went shopping, days out, meals out as couples, etc. We have had a couple of short breaks away together but they are very different to us, don't drink at all, love walking and climbing whereas we like sunbathing and relaxing. Our children and grandchildren feel she is part of our family, very close.
However, I think she has changed recently, is perhaps developing a dementia type illness, she has become very aggressive with me, doesn’t understand simple ideas and gets confused with things. I feel as if I want to avoid her really because she tackles me about different things, even on the phone, says I oughtn't to be interested in various subjects which she considers should be left to my husband because she feels it’s a man thing. She senses that I’m withdrawing and keeps demanding I ring her but I don’t want to!
I feel as she has been such a good kind friend in the past, I owe it to her to support her in this illness, if it is that. But I instinctively want to protect myself from the aggression and nastiness she shows towards me.
I feel sorry for the OP and can’t offer any more advice than has already been given.