WHY IS MY BOYFRINED ACTING LIKE THIS? WHAT SHOULD I DO?

i only been with my boyfrined for a few months i love him so much and he means every thing to me but at times i feel unappreciated by him. one of the biggest problems that i feel i like we dont have is talking well on his part. he dont even call like he would use to he would call me almost every day and talk with me but now he only calls once a week and dont stay on the phone with me for no less then 7mis like how can you let a whole week go by with out evening calling me but one time a week?? then he'll always text hi every day but dont call i mean texting is ok every now and then but i wanna be able to hear his voice u know that use to be the joy of my day when he would call. and i tryed calling him but when i do he'll say he's doing some thing right now let me call u back or most of the time he wont even pick up his phone and wont call back like (wtf) when i would call him & he miss my call he would call back but now he dont. he say he never was the talking type which i can understand cause neither am i but with him i wanna talk i mean im his girlfrined u say u love me u wanna be with me were together u should wanna talk to me almost daily u know. i went so far as to text him cause he dont stay on the phone long so i text him i how your day went blah blah he was texting back i told him i miss him do u miss me... gues what he stop texting me but the next few days go by mind u still no (phone call) but gonna text me 3days later saying what u doing. r u serious! like what the hell and it piss me off so bad till the point i wanted to curse him out how u gonna stop texting when i ask u did u miss me?. and he dont even know how much he hurts me and break my heart by doing that i tryed almost every thing i could think of but it don't seems like it's working. I REALLY WOULD LIKE SOME ADVICE ON THIS---- PLEASE RELPY