Bf problem!!! need helppp

hola guys....... My friend and bf , who is studying with me from last 6 years today asked me for my contraseña and correo electrónico address of my fb account.I asked him why he needed that? He dicho that he wanted to see with whom i chat. Well , i gave him cux i trust him and he iks my childhood friend......He is too over-protective about me. He doesn't even lets talk to my other guy frndx....... Whenever I do , H ebehaves like hitler.....This is ridiculous........He always used to flirt with me in middle school and in highschool he has became my bf..... The problem is that he is too jealous and protective about me.