am i being selfish if i don't say how i feel?

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i don't know. my brother and i had a fight. it's a silent type though. we didn't talk to each other. then, i couldn't contain my anger anymore 'cause he said things like 'F.U all' and 'what a useless person are you'. i was really angry and that i didn't talk to him and besides he has become so disrespectful to me. i am older than him. just a year though, but i still want even just a little respect. i said that if he has problems with me, he tell me and not use 'all'. then he said i am selfish, because i don't say how i feel. he said i never did so why would he tell me how he feels. yeah, i realized that i've never told him how i feel but that is because i thought he knows how i feel. when i feel angry, sad or happy whatever, i feel like i don't have to say anything because you can see it in me. besides, i am not comfortable talking to anyone in my family how i feel especially when i feel bad. i don't want them to worry. i'm the eldest child in the family so i feel like i have to always keep strong. am i being selfish? i thought my brother already knew me. after everything we've been to together.. guess life is getting harder as you grow.