What should i do about my boyfriend?

so i felt like my boyfriend of 3 months had been pulling away from me. the week b4 last we were supposed to go out on the sunday, he didnt answer any of my calls/text so i didnt conact him. he got in touch on the wednesday askin if i was talkin to him. we sorted everything out and we arranged to go out the following sunday but the same thing has happened!! i sent him a text sayin if i didnt hear from him i knew it was over abd he hasnt been in touch! i dont get it, we had a great relationship and i dont know whats gone wrong. should i call him n find out? its been over a week since iv heard from him n im so confused!! please help!!