You have a sister, a family? How very fortunate you are...
Perhaps you don't realise it, but you have more that many people have and i do envy you...
Even if your long friendship with your sister has cooled, and you're both angry with each other... don't give up totaly. You will surely regret it somewhere along the way. Be diplomatic, as you would with ordinary people. Be polite and pleasant, avoid sensitive topics, pay compliments and little attentions. (Such as birthday wishes etc.) You will never regret it. Most of all, watch your speech. A word out of place, or something said that might hurt or be considered humiliating can not only destroy a relationship, but the person herself...
My mother (now almost 85) had three sisters. Over some past wrong, real or imagined, they haven't spoken to each other for over 60 years... My mother's youngest sister passed away in a nursing home approximately 3 years ago, and believe me, when my mother found out, she was completely distraught. Not only over her sister's death, but that they never forgave one another, that they never mended things, and now it's to late.
Be wise before the fact, so that you don't cry when it will no longer be possible to mend...
Thank you for your wise advice. I think what I need to do is stop emailing her -- that is where we get tangled up over words. I need to just call her once in a while to say hello and leave it at that for now.
Carolyn