Leon, your boyfriend is indifferent and likes to ignore you. He doesn't bother turning around to reply to your conversation,he doesn't seem to love you but...he is very sensitive and keeps you in silence.

one day you approached Leon on campus, but he didn't bother turning around and just passed you

Leon saw you frown from the corner of his eye, he stopped but didn't turn around and said as he continued walking

"if you are slow you will be left behind."