well I sometimes find myself feeling like I am not liked or do not have many good friends, but I know this is in my head.
If you want to see your friend and you know she is coming your way, call her, say, he you are coming my way soon aren't you, have time for a quick drink with me? I think your expectations are too high without having talked to her about it. She might be working out her plans, and about to call you and make plans with you. It might be that she has some other commitments that limit her time. It is not all about you. (I say that kindly)
I think it is important to bear in mind that--
People are busy with their own social lives, families, problems and insecurities, so while you might be thinking, "she doesn't like me", it is very rarely about you.
Be proactive, call people, ask people to do stuff, and do it more than a few times. I am lazy like that and I actually hate the phone, so ringing people is a big deal for me, but I make myself otherwise things would slide.
I had a crap time growing up, and my parents have no friends so it is not a good model. I can see how short they are with people and how easily offended they get. I try and shrug it off more and expect less of people.