He has a very busy schedule with school, homework, and sports, but when he says he will call me, he usually doesn't.
Actions speak louder than words.
It could be that he really is too busy to call. Alice's hunch is that if he really wanted to, he would make the time to call you. Perhaps it's time for you to move on. Don't give him more than he's willing to give you. This is something that becomes apparent as you spend more time with a person.