This guy said to me after having sex “your crazy” and smirked, I got really offended but then he said in a good way of course... what does he mean by this? It doesn’t sound good to me lol.

Walt is right. You shouldn't be having sex. A true gentleman (worthy of your kitty) would not smirk and say your crazy. He would respect you afterwards... But he got what he wanted so chances are he's about to toss you aside and move on to the next crazy lay. SMH!