a note about being korean and speaking korean

it isnt too easy to have a conversation in korean
without hearing a few english words, if not several.
pass, nice, fighting, real, member, smile, etc, etc

but on any occasion, i try to avoid using english.
not only korean is a beautiful language to speak, but
i feel awkward inserting, rather, random english words.
(i wear my brothers' really cheap korean cloths from 90s)

then when a conversation somehow turn into "me",
people often ask me if i forgot how to speak korean.
better yet some people do say i speak poor korean.

and i dont know if my intentional usage of pure korean
words makes my conversational korean weak.
(then some comment on how i dress up in american style)