Am I being played?

So I’ve been snapping this guy for a month now and we used to ft and stuff all the time but recently we haven’t been FaceTiming. He used to snap me things like “Goodmorning cutie” “how’s your day going” and he would give me details about his day too. But recently like the past two days he has seemed kind of off and distant. Like when I say Goodmorning he says “you too” and when I ask him what he is going he says “stuff.” I asked him to FaceTime today and he said “sure when I have time.” Should I be worried or am I overthinking this situation? I don’t want to go overboard and push him away since I actually like this guy.