I know the feeling is a sympathetic way of saying you have been there. I know the feeling, it happened to me last year.
It offers company rather than advice, which is usually what is wanted. It is warmer than tell me about it and less competitive.
1phrasei know the feelingA sympathetic way of saying you have been there.
“When she described the first week he said I know the feeling.”
i know the feeling is a phrase.
Practised in Small Talk & Everyday Phrases