Most Helpful Girl
You have to determine if you are getting your needs fulfilled in that relationship or if you aren't. You can't make him change his behaviour, and waiting around hoping he starts to change doesn't do any good either. You can express to him how you are interpreting his behaviour i. e. when he doesn't respond you feel like you aren't a priority to him, and see what his response is. But you might just have to accept it's not the kind of relationship you want.