I don’t think that being viewed as “straight” by people, queer and straight, is a privilege. It’s invisibility. It’s a life of being forced to live in the closet.
You are bi because that’s who you are. You have no reason to be ashamed of that. You have no reason to feel guilty. You are not alone in your struggle, there are many of us out there, and we know how you feel.
What other people may say or think about me, about us, has no bearing on who we are. No matter who we date, no matter who we have sex with, no matter who we fall in love with or marry, we are still bisexual. No one can take that away from us.
When someone comes out to you, it is not about you and your feelings. It’s about them opening up to you and trusting you with a part of their life that is very fragile.