This is the main question of the post, so this is what I'm going to address.

The answer is "No." Your emotional attraction and sexual attraction can differ from gender to gender or person to person, depending on who you are and where your tastes lie.

I'll use myself as an example. From a sexual standpoint, I'm bisexual. Depending on the person, I can be sexually attracted to both men and women. However, I'm NOT biromantic. At this point in my life, I have only sought out (and been a part of) meaningful relationships with men. I can't imagine myself being with a woman romantically.

Who knows what can happen, though? Like Webgoji said, sexuality is a broad spectrum, and it's very fluid, so it can change over time. Until recently (meaning within the last six months), I was convinced I was heterosexual. Now, if I were to rank myself on the Kinsey Scale, I'd be at a 2.