ashamedHe was ashamed that he had been caught stealing.
embarrassedI was too embarrassed to admit I was wrong.
abashedShe looked at the floor, abashed.
shamefacedHe stood shamefaced at the door, looking at the vase he had just knocked to the ground.
sheepishShe startled, then gave him a sheepish smile as she picked up her dropped papers.
guiltyI feel so guilty about forgetting her birthday.
humiliatedFeeling betrayed and humiliated, she considered quitting her job.