Have you ever been disappointed by a very close friend in this way?

Since leaving my home state and my closest friends I have made some huge changes in my life. I am divorcing my husband, going back to school, working, and trying to forge a new path. These things were a long time coming and I know they are what is best for my children and me. I recently sat down and wrote a long letter to one of my closest friends back home outlining the changes, the reasons for the changes, and my long term plans. I know she has received the letter and as of now I haven’t heard a single word. I am very disappointed that she hasn’t responded at all. Have you ever had a similar experience? How did you handle it?