Confused

Am a girl of 24yrs am in love with a guy that doesn't love me back,have tried everything a girl can do to prove to him how much i love him. i really wanna be with him nut to him, reverse is the case. if i don't call,he doesn't call if i don't ping,he doesn't ping. i tried talking to him,he keeps telling he will change but no changes atall.i love him so much and its killing me. what can i do