Really confused

So my daugter turned 4 this week. I am so happy for her and me. I feel like she is really adjusting well to my separation, and being in a new school around new kids, but I hear that kids are very adjustable. . I am worried about something and its me and my personal relationships. I always hear you get what you put out and I guess my friendships are true to form. I mean I dont think I am high maintenance but soemthing is bothering me. Phonecalls. The most common form of comuincation is not working for me, or me and some of my friends. For instance my daughter had a gathering of a few other 4 year old kids. I invitied a close friend and her mother. So Sat comes around no show and no phone call, even after they made a confimration that they were coming Via text.. I have a friend that doesnt return phone calls for weeks at a time, a friend that despite having the latest and greatest in phones( i-phone) I cannot get text messages returned at all. I dont know if its me or them? Is how I get treated how I treat others? Am I that bad a friend? Is this really a big deal? Am I making a mountain out of a molehill? Well I have been thinking about this and I find the fault is all with me. I am notorious for looking for so much in people and forget that alot of what I am looking for has to come from me. I have 4 sisters and I was close to one of my sisters and we grew apart. I am basically looking for that type of relationship in other people.Looking for a replacement family or sisterhood. Is that fair? No is this right? I put alot of pressure on people all unrealistic and want alot from people. But I always think people want alot from me. Is it "right" to not  let someone know if you are coming to their bday party, no but I know that person is immature. About the returning phone calls well the difference between that person and me is the fact that person has other things to do and doesn't make things that I think are important a priority. Which I can kind of see, since I am not working  I do have alot of time on my hands and have become very insular. So at this point I want to be a good friend and not think people are waiting for me to become their social outlet, like I wait for others to be. I sometimes am totally stuck and sometimes I don't know what to do to meet other people. I know I need to and I want to broaden my social base because this isn't what I had in mind. Wish me luck.....