if they were your'e real friends, they would know everything about you, likes/dislikes.I dunno. But if they're really your friends, does it matter that they know you read manga? Or vice versa? Food for thought.
Doesn't sound like to good of friends if they haven't realized you like manga.
I was open about it though when I was in school, would read in class or in the hallway or after practice. A lot of people I never would have guessed liked anime/manga and talked to me about it, I also got people interested.
since when is manga reading a tabu?
Not just my friends but when people ask me what do i watch/read I just tell them the truth & since Manga/anime happens to be what i enjoy , they'll know .