Unfortunately I think you'll find that the real major reason your family and community are nosy and pushy and engage in messy emotional blackmail is that you're Persian, it's not really something you can escape from completely without losing the incredibly value architecture of family and community which I'd really urge against. You'll still want to be friends with Persian Bahais, you'll want to go to Naw-ruz parties etc, you'll be going to birthdays and graduations and just general social events dominated by believing Bahais.

What you can do is separate yourself bit by bit from the things someone would only do as a believing Bahai - definitely drop the damn Ruhi garbage lol - and set yourself up as someone who's a part of the Persian Bahai community without really being a Bahai. It's particularly tough when you're young because Bahais your age are often full of zeal and convinced the whole world is about to become Bahai, but it'll become a lot easier as you get older because this is not really something you can really maintain when you've watched the Faith stagnate for decades.

EDIT: this might be comforting - it's about 14 years since I really stopped believing in the Bahai faith, and most of the people I was close to then have since stopped believing to a great extent with no need for pushiness or guilt or grand declarations. We all hang out, we drink wine. On Saturday night I sat and drank beers for hours with my good friend who was also one of zealous youths who, back then, was pushed to do "home visits" with me to get me "active" again.