I think most everybody has been "left out" at some point in their lives. I'd be willing to bet that most people get left out of things on a regular basis. That's just a part of life. At a certain point, everybody needs to accept that it's a part of everyday life. Very few of us are going to be included in everything for everybody around us. For me, I accept that it will happen, and I move on. I focus on the things I can control. I focus on the people that do want to spend time with me. It's self-destructive to do anything else with it.