Portia, I don't consider your posting a downer. I consider it growth. You are recognizing your potential, how people see you and yes, how they rely on you to be at their beck and call and jump when they snap their fingers. I'm very sorry that someone called and you weren't there lickety split. They tend to forget that we have lives too. I know all to well how you feel about such things. As for your friends/family going out to have fun, but only think of you when they want or need something...boy do I know how that feels.
As for Skippy, he got his ego kibble fix and has gone back into the rabbit hole for a bit. He'll be out and about again soon...because spring isn't that far off and he'll need another ego kibble before then. As for your mutual friend, maybe she's busy and just hasn't had time to drop you a note or a call. If she's living in an area where the weather has been crazy this year, she could be busy shoveling snow or the power is out...not making excuses, but people do tend to fall off the grid every now and then.
Spring is around the corner and I think that you will begin to foster new friendships/relationships as the weather becomes warmer. What type of interests do you have? Think of areas of projects and hobbies that you would like to do and that's where you'll find some classes or group meet ups that will help you w/meeting new people. Portia, I have no doubt that when you are ready, you will soar.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.