They love you... then, they go dark. They want to see you... then they ask you why you are so demanding/clingy/bitching at them.
What to do: Instead of trying to adjust yourself and your expectations (over and over again) for someone who will constantly change the game, you need to make a clear, empowered decision that you will not settle for anyone's half-assed, second-best approach to being involved with you—in any capacity. You are worth more than they way you are being treated, and you need to stop settling for it and tolerating it. Tell them what you want... if they don't come correct, you are either being played, or they aren't ready for you.