Hi, Im' 40+ and I have it to a certain degree, and since Christmas I stopped communicating with my older sister who lives 1,000 miles away.
I guess since I haven't seen her in 7 years I no longer "know" her and she is kind of fading out of my wanting to communicate and all that with her anymore. A twice a month 15 or 20 minute call that goes the SAME like a broken record every time is just not a "relationship" I feel like bothering with any more.
So far I have not talked to her since December, she called and left a few messages , but mostly I have been leaving the phone off or the machine off.

Finally Monday I mailed her a note after I got a card from her asking me to call sometime, basically I said in my note about the 20 min calls twice a month and tha in 10 years we will talk for about a work week and that I don't feel like I want to "do" long distance relationships any more etc.
Guess she will persist and doing so will just piss me off and create resentment. I almost want to get someone to call her to tell her to leave me alone and goodbye!