Naturally.
I will provide an example.
Boy meets girl.
Boy says, “I love the girl.”
Boy knows he loves the feeling of being love, not the girl herself.
Yet, boy continues to insist that he loves the girl, because letting go of the affectionate feelings is too painful.
Boy suppresses his knowledge, and conforms his behavior to mimick true love.
Boy and girl become unhappy.
Boy has lied to himself.