There was a time when I had nobody who liked anime/manga/cosplay either, but I showed some mangas to my cousin. It's hard to believe that I have so many cosplayer friends, because formerly I had none. I really am lucky. I hope you will get friends who like to cosplay!
well i do have cosplay friends just not relatives who likes to( cuz their older than me, im the baby of the family). i asked my sister to read some manga books i have but she gave up less than 1.3 seconds. she'll like certain types of mangas or anime but doesnt like to cosplay as them.i wanted a sister who likes the same things as me and we can talk about it together, but she is more of the beauty lover and fashionista.thank you for the advice though! it really helped!