@Lazeelink, everyone's missed the other half of the story.  According to the transcript, Trump tried many times to get Comey to pledge loyalty to himself, like a mafia don, and even tried to manipulate Comey into making a self-incriminating statement about an ongoing investigation.  Reading between the lines, Comey sensed a trap and saw how Trump was making a clumsy, artless attempt to get him to say something he could later hold over him, but Comey was too smart to take the bait and kept silent.  Comey was also smart enough and wise enough to write notes of his conversation immediately after his meeting, to protect himself.   (BTW it's almost certain the room was bugged).