maybe you should stop calling him brother ┑( ̄Д  ̄)┍
Eh i feel like its fine tho? Its kinda like a honorific or smtg- like xiaoxiu哥. Kinda like hyung.
lol but if he keeps that up he will consider him his little bro all the time subconsciously
maybe you should stop calling him brother ┑( ̄Д  ̄)┍