That's so wonderful, Zephyr!!! I'm in the same boat - I consider myself bi, but I'm married to a man (being a woman), and I generally end up with men. I love women, I think they're beautiful, but I doubt I'd ever end up in a long-term relationship with one... well, unless maybe they were bi too.
I haven't made a big deal about it with my mom, because it's not affecting my lifestyle in any way she would need to know about. My sister and brother know and are just fine (where do you think I learned about such deviant behavior??
). Mom prob'ly knows, but it doesn't matter.
Tell who you want, you're under no obligation to unless you feel like it!!
I'm so happy for you!!!