addled, baffled, bamboozled, beaten(or beat), befogged, befuddled, bemused, bewildered, buffaloed, confounded, confused, discombobulated, disoriented, flummoxed, foxed, fuddled, got(or gotten), graveled(or gravelled), mazed, muddied, muddled, mystified, perplexed, posed, puzzled, vexed(also vext)
stuck, stumped, weirded outabashed, discomfited, disconcerted, discountenanced, embarrassed, fazed, flustered, mortified, nonplussed(also nonplused), rattledagitated, bothered, chagrined, discomforted, discomposed, dismayed, disquieted, distressed, disturbed, perturbed, stunned, unhinged, unsettled, upsetbeguiled, cozened, deceived, deluded, duped, fooled, gulled, hoaxed, hoodwinked, humbugged, misguided, misled, snowed, strung along, taken in, tricked
gone to one's head