I hate my life and this world

On a school rooftop, a boy and a girl can be seen standing facing each other. The boy has a dead fish look while the girl looks a bit nervous.
The girl, after hesitating for quite some time, finally dared to speak, but her next words were something very unexpected, stopped, or completely predictable for the boy with the dead fish gaze.
"Get away from Alex and get out of his life!" His words resounded throughout the terrace and then it could be seen that the girl ran towards the stairs.
The boy stayed on the terrace for quite a while and then walked to the edge of the terrace. If anyone else saw him, he looked like someone who wanted to kill himself, but what he did would leave anyone passing by speechless and they would judge him as crazy.
"Please kill me!"