I will keep my story short, there is my best friend I am with him for 4 years and then there is a girl i also know her for 4 years. They both are my really good friend but some days before i used to sit with that girl and I like to sit with her also my grades got really good because of sitting with her. The problem is my best friend gets jealous whenever he see me with her (it's not like that he like her). He also blocked me and he also started to ignore me. What should I do ??