He wont call me or take my calls.?

I have been seeing this guy for a little over a year, i love him but over the last week he wouldn't return my call or text, i didnt cheat i cook and do things to show that i care, im not clingy i dont get mad if he hangs with his friends or have to go out of town, we did speek recently and i asked why he was shutting me out and he said he had a lot going on but we were fine, he said he missed me and to call him later i didnt but when i called today he didnt answer and didnt call me back (we did get into an argument bec we messed up each other cell phone bec we were playing around) i dont know what to do.