Who is Killer of Feliks avagyan?

Tatevik Hovsepyan is a girl that is from same school as Feliks avagyan. Feliks avagayan fell in love with her all ready one year.He loved her a lot even when Tatevik doesn’t deserve that much love. The way Feliks loves Tatevik No one in the world has loved anyone as much as he did, he dreamed about her all day he love her,he would give his life for her.but tatevik still rejected him after everything and feliks avagyan was found dead laying down on the floor next to his divan. Girls when a boy love you and you love him to DONT BREAK HIS HEARTH IF HE LOVES YOU THE MOST IN THIS WORLD IT DOESNT MATER HOW OLD ARE YOU JUST DATE HIM PLEASE AND THANK YOU.