ok.a couple nights ago my parents told me my brother is int my brother i feel like

i lost a Big part of my lif? ok.a couple nights ago my parents told me my brother is int my brother i feel like i lost a Big part of my life hes apparently my cousin i mean for 14 years i have been lied of i feel sad and guilty idk wy hes in iraq ok i dont know why i feel his way ok bye
i cant talk to my parents they thought i knew but they decided to tell me again