(idiomatic) nowhere to be seen, nowhere to be found, disappeared without trace

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

shadow / a shape or form reflected in light / presence / negative aspect

shape, form, style

perfect, completed

completeness / perfection

light / a shape or form reflected in light / a shadow

shadow / light / a shape or form reflected in light