all in (one's) head

Not substantial or real; having been imagined or invented. I don't know why you think I don't trust you. I can assure you that it's all in your head.

Name	Pronounced	Usage
Brijesha	-	Hinduism
Normand	['nɔ:mənd]
Selena	[si'linə]
Ioana	-	Romanian, Bulgarian
Martta	MAHRT-tah	Finnish
Gudrun	GOOD-roon (German)	Norse Mythology, Swedish, Norwegian, Danish, German