don’t cry over spilled milk

(proverb) don’t get upset about small things that have no importance

Example Sentences:

A: I missed my bus! I’m so angry!
B: Hey, don’t cry over spilled milk. Another bus will come along soon.

I know you feel bad about failing that test, but you really shouldn’t cry over spilled milk. I’m sure you’ll do better on the next one.

Media:

Similar idioms:

1. under the weather
2. rub salt into the wound
3. beside oneself