Learn useful ways to say "i don't know" in English with drama examples and natural alternatives.

It means the speaker is deeply thankful and feels they relied on the other person a lot.
From Do Not Deceive Me, Episode 56
He is expressing gratitude by saying he does not know what he would have done without the other person.
Use this to thank someone warmly after they supported you. It is common in emotional or close relationships and sounds sincere.
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