Not know where to look
Definition 1 of 2

Social Embarrassment
Use this when you're in an awkward social situation and feel uncomfortable about where to direct your gaze.

During the surprise party, when he didn't show up, I didn't know where to look.
Avoiding Tension
It expresses the desire to avoid eye contact in tense or conflicting situations.

When they started to criticize each other, I didn't know where to look.
Witness Discomfort
Used when you witness something that makes you feel secondhand embarrassment.

He spilled coffee all over his shirt during the speech, and I didn't know where to look.
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