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
Lucy	['lu:si]
NaĎA	-	Czech
Aminda	ah-MEEN-dah	Esperanto
Hulderic	-	Ancient Germanic
KÅRe	KOR-e (Swedish)	Norwegian, Swedish, Danish
Tasia	-	Greek