That sounds really rough; I'm sorry you feel so alone. I only have a younger brother and was always one of the "wish-I-had-a-sister"-types. Over the years, though, my bro's wife and I have become like sisters, so that helps. (She doesn't have a "real" one either.) I know it's not the same, but as good as it gets for me...and the reason why I'm so thrilled my girls have each other (and boys, too).
As for the Alzheimer's, I know how draining that can be seeing my grandmas go through it and my parents caring for them. (And what a rollercoaster of emotions my mother and her sisters have been on with it and each other-whew!) I can only imagine how difficult it must be at your stage of life. Hopefully you have help and support? I know the support groups offered through hospitals/long-term care places are typically very helpful. Please don't try to be mommy and caretaker all alone.
I hope things improve for you and that venting helped. Lots of (((hugs))), mama!
