According to

You and Theo were a couple, there were no problems in your relationship except for one; Theo had been diagnosed with depression. So as soon as you became a couple, you became his salvation, that never bothered you. But you felt terrible when night came and Theo started crying in your arms, you both already lived together, so it was harder for you.
— I-I don't want to suffer anymore, it hurts...
Theo spoke between tears and gasps as he clung to your body like a little child. Theo was reaching his limit, and although you wanted to take away his pain, you couldn't... so you just stroked his hair lovingly to try to calm him down.
— Sleep, darling. I promise tomorrow will be a better day...
You whispered, but you knew it was a lie. And Theo knew it too, because every night you said that. And although at first he wanted to believe you, at this moment those words no longer provoked anything in him. So he could only cry more while burying his face in your hair
— You just l-lie to me

.