to feel / to sense / to experience

lonely

loneliness / solitude

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

(idiomatic) to feel inferior, to feel small

having no living relatives / having no one in the world on whom to depend

kodokushi, lonely death

to die a lonely death, die alone