“An idiom for looking foolish because of embarrassment of being unable to get what you purposed or desired”

One day a girl proposed her beloved in an assembly to marry, but the beloved didn’t give her his heart, and therefore she felt embarrassed and looked foolish and went back because of failing to get what she has been desiring for ages.

Example:

Having looked in the mirror, she felt to be at a loss. So much pride her Lordship had on not giving the heart!

Dose “at a loss” somewhat suit the example ? If not, then the idiom is needed as expressed in the Title box.

Solution 1:

A good word to describe this feeling is crestfallen, which describes an intense disappointment that comes after having high hopes. It connotes the expectation or strong desire for a positive outcome, and having those hopes dashed. One would not be crestfallen over not winning the lottery (since it’s so unlikely in the first place), but it fits perfectly for an intense, personal disappointment that comes as a surprise. It doesn't quite capture the feeling of embarrassment, but it is a strong disappointment that's often mixed with shock or surprise.

Solution 2:

Related words and idioms:

Mortified - feeling or showing strong shame or embarrassment.

(to) Lose face - suffer a loss of respect; be humiliated.

Egg on (one's) face - look stupid because of something that you have done. Example: "She had egg on her face after sticking her neck out at the school assembly and proposing to her crush who did not requite her love.