If he's not calling you, it's because you are not on his mind. If he creates expectations for you, and then doesn't follow through on little things, he will do same for big things. Be aware of this and realize that he's okay with disappointing you.
Greg Behrendt, Liz Tuccillo (2009). “He's Just Not That Into You: The No-Excuses Truth to Understanding Guys”, p.34, Simon and Schuster
