How do you call someone who stopped caring long ago?

 Sometimes I read our old messages at night Like that 25th when I told you my truth

 You made me believe we had time on our side I fell harder than I ever knew

 I loved you more than words could say You walked away, left me holding love in my hands

 You said you weren't ready, then found someone else But did he give you half of what I would've bled?

 You said you understood me, you spoke my pain in English That was your magic, your quiet art

 One day I'll tell my kids about your smile Your glasses, your eyes, brighter than three suns

 How the world would freeze when you stood close to me Just you and I and nothing else was real

 I loved you quietly because you forgot me The moment you said your first goodbye