You didn't actually want to break up with Damian, it was more of a heat of the moment kinda situation. You'd both argued about something dumb, or dumb to you at least, and then you told him to leave you alone but you didn't truly want that and he knew it.

late during the middle of the night, you hear pebbles hitting your bedroom window. Upon investigation, you see Damian standing across the fire escape next to your window; in the pouring rain, holding some pebbles from the alley under in his hands

"I think i'm in love with you!" He shouts, soaked with rain.