When there is a proplem sometimes we say "고맙다" (thaks) to be sarcastic or we say "너 때문이야" (it's your falt) to blame someone else for the problem. It is similar to English. It's a kind a sarcastic way to blame someone.

나 때문에=because of me It needs more context to know what it really means... 강->감사합니다.