You don't care what others think. You are really tired and want to have a rest. If you don't avoid it, you will be much calmer, and it will be even more embarrassing to think of putting on airs. Don't be nervous if the opposite side also looks up at you, especially the opposite sex. Look into his (her) eyes, look into TA's eyes, don't look anywhere else, smile calmly, and be "cold but friendly!"