self-deceived

US: (self′di sēvd′, self′-)

WordReference Random House Unabridged Dictionary of American English © 2025

self-de•ceived  (self′di sēvd′, self′-), adj. 

1. holding an erroneous opinion of oneself, one's own effort, or the like.
2. being mistaken, forming an erroneous judgment, etc., in one's own mind, as from careless or wishful thinking:
   If you thought my friendship was love, you were self-deceived.

• 1665–75