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
Manuel	mah-NWEL (Spanish), man-oo-EL (Portuguese), MAHN-oo-el (German)	Spanish, Portuguese, German, English, Italian, French, Romanian, Late Greek (Latinized)
Ovidius	-	Ancient Roman
Nigel	['naidʒəl]
Bran (1)	BRAN	Irish, Irish Mythology
Avidan	-	Hebrew, Biblical Hebrew
Claud	KLAWD	English