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. Don’t be with someone who doesn’t do what they say they’re going to do. If he’s choosing not to make a simple effort that would put you at ease and bring harmony to a recurring fight, then he doesn’t respect your feelings or needs. “Busy” is another word for "uninterested". Life is too short to fall into wasted time.