I'm 'ashamed' [='embarrassed'] 'to admit' it, but I still don't know how to ride a bicycle. = I'm 'ashamed to say' I still don't know how to ride a bicycle.
We were too 'ashamed to go' back to school. [=we didn't go back to school because we were too embarrassed]
She was 'ashamed' that she hit her brother. = She felt 'ashamed' for/about hitting her brother.
(..) You tellin' me I raised a thief? I'm not a thief. You take property that's not yours, property that belongs to another man. That junk was his livelihood. - I'm ashamed of you! - Senior... Shut your mouth. You think you can take things and not have him see it? Neither one of you's got any respect (..)2012 Mud
(..) - No? What would you call it then? Not to mention draggin' these boys into this... Man, he's really giving it to him. You got any idea what you're doin'? I'm right ashamed of you, Mud. Don't expect any help from me, 'cause there's none to be given. All right, I'm ready. Where you goin'? Hey! (..)2012 Mud