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
Ofir	-	Hebrew, Biblical Hebrew
Gordon	GAWR-dən	Scottish, English
Hoshi	ho-shee	Japanese
Jarmila	-	Czech, Slovak
Jace	JAYS	English
Nerses	-	Armenian