"Do you think I'm crazy?" Insane people never wonder if they are 'crazy'. Only the sane ask that question.
batty, berserk, bonkers, cracked, crazed, cuckoo, daft, delirious, demented, deranged, dingy, dippy, erratic, flaky, flipped, flipped out, freaked out, fruity, idiotic, insane, kooky, lunatic, mad, nutty as fruitcake, of unsound mind, out of one's mind, out of one's tree, out to lunch, psycho, round the bend, schizo, screw loose, screwball, screwy, silly, touched, unbalanced, unglued, unhinged, unzipped, wacky, warped…….