What does it mean when you tell a guy you like him and he says I know Im dead?

When a guy responds "I know" after you tell him you like him, it can suggest that he was already aware of your feelings, which might indicate he has some level of interest in you as well. However, saying "I'm dead" could imply that he feels overwhelmed or surprised by your admission. Overall, his response could reflect a mix of flattery, acknowledgment, and perhaps a bit of humor about the situation.