口语中常用的Been there是什么意思？

情景会话1 好友Sam深受抑郁情绪困扰

Sam: I just couldn't sleep. （我就是睡不着。）

Zoey: I know how you feel. Been there. （我明白你的感觉。我理解。）

情景会话2 好友Jack安慰我

Jack: I understand it's very hard to deal with all these problems by yourself. I have been there. （我明白自己应对所有这些问题很难。我经历过。）

Zoey: How did you get over it? （你是怎么挺过来的？）