self-deceived

American  

[self-di-seevd, self-] / ˈsɛlf dɪˈsivd, ˌsɛlf- /

adjective

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.

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Etymology

Origin of self-deceived

First recorded in 1665–75

Example Sentences

Maybe I’m no less self-deceived than anyone else.

From The New Yorker • Oct. 28, 2019

We know Mumler was a fraud, but we don’t know what kind of fraud — self-deceived true believer, confidence man or both?

From New York Times • Nov. 2, 2017

His observations are not always adequate to his ultrasophisticated posture; hence the posture; sometimes looks a little self-deceived.

From Time Magazine Archive

Beatrice and Benedick are self-deceived in that they believe their heads can sternly rule their hearts.

From Time Magazine Archive

But this may fairly be regarded as showing how apt an observer is to be self-deceived when he is entirely persuaded of the truth of some favourite theory.

From The Library Magazine of Select Foreign Literature All volumes by Various