?

My boyfriend and i have been together for about a year now, and still sometimes when i call, he doesnt answer at all, and i dont see or hear a word from him for a good 24 hours. All i want is to know he's okay. Im wondering if he's over me, or if he's seeing someone else.. He always has excuses like i ate too many mashed potatoes and fell asleep or i was at a birthday party.. Meanwhile he's updating his facebook nonstop, but wont answer my calls or call back...??

Do i ignore his calls as well? But then he'll suspect me of cheating?