Help me please i need your help..thank you?

me and my boyfriend we were going out almost everyday we are together for 8 months now we were going out almost everyday now i barely see him 1 day every 2 weeks and when i ask him are we going out tomorrow he says yes and then when tomorrow comes he tell me no sorry for any reason i know he love me so much and he tell me that he miss me and lets go out but then for some reasons we don't go out ..IMP: he don't have another girl i am sure of that.. but i don't know what to do i miss him so much it is been 3 weeks that i didn't saw him...SOME HELP HERE PLEASE thank you..