I am bisexual and my girlfriend and I are planning on having sex for the first time. We both are virgins and want to lose it to each other but don't know how and how will we know that we lost it?

A friend of mine told me I was a racist because I'm not attracted to people who aren't of the same race as me. I don't really know why this is, I'm just not attracted to them. My friends are from many different backgrounds so I don't think that I am a racist. Is it weird to only be attracted to people that are the same race as me?