self-deceived

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

adjective

holding an erroneous opinion of oneself, one's own effort, or the like.
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.

Origin of self-deceived

First recorded in 1665–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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