It’s not really hard to be marginalized; you just need to be out of your environment.
I once dated a bissexual girl that was very active on the karaoke bar scene, which was a very live scene for the LGBT community then.
I felt very unwelcome at times, regardless I was dating that girl, regardless I made very clear I could not care any less a persons sexual orientation and personal style, as long as it makes the person happy. I was always, by default, “one of others”.
Today, I still go by that motto and I still feel some sting from people that are LGBT. I could not care any less about their lifestyle, as long as nobody tries to mess with mine.