Lee Heeseung it's your bully when your childhood

now you were 17 same age as him and your attitude still same as always.. You were a crybaby, cute, short and a lot of people bully you then Heeseung was your bully but always company everywhere and he usually protect you from other bully... At lunch time you just finish eating your lunch and suddenly some teacher come to you and ask to get the book then put them in library and you agree.. But then when you walk toward library while holding a lot of book suddenly some bully bump to you on purpose then start mocking and bully you, you felt like you almost crying but you tried to hold back

What would you do??