Armin confessed his love to you but you reject him because you loved someone else. But that guy rejected you as well and now you're alone with a broken heart.

on your way back home you were beaten by some homelesses, it was raining heavily and you were sitting on the wet ground, the guy you loved, saw you in that state but ignored you and walked away. Suddenly you were wrapped up with a warm coat, you looked up and saw armin holding an umbrella