I would say not to worry about sexuality, I see it as a term that can be used to label people based upon what gender they like and really it shouldn't matter to anyone other than them and their partner(s)/attempted partner(s). While a person's sexuality is part of their identity, it makes up so little of it that it doesn't matter/shouldn't be an issue for anyone other than them (and I don't mean an issue in a negative sense, I'm trying to explain it, but I am fumbling, so I am just going to leave it at that).
I have a bit of a story to tell about myself and I hope that it might sway anyone that comes across this post that thinks another's sexuality matters (to anyone outside of that person) to realize that it doesn't. Back when I was younger I was what you would call a... I don't really wan't to say the term because it gives credence to labels of one's sexual identity which would imply that makes them overly different when that isn't the case, but you know, I was opposed to same sex couples.
Eventually, I met my first college roommate, who was attracted to other men. I got to know him and I realized that he wasn't different from anyone else, just a kind and normal guy (awesome actually). It was at that point that I realized who the **** am I to judge someone else based upon their sexual orientation? I mean seriously, I was better than him in no way, what right did I have to judge him? I had always thought and boasted about how I was accepting of people liking different things, at that point it hit me like a brick that I wasn't, he was just another person who had a different preference than mine, but in this case it was in the dating department.
That realization made me grow up, because you know, it is fine for people to like different things and have different preferences.
Straight, Gay, Bi, Tri, it doesn't matter to me now. I have learned to respect people for what they do and what they choose; judging someone based upon who they are attracted to is foolish. Doing so only closes doors to some potentially awesome friends because of the belief that they should like the same thing (or gender in this case) that you like.
Sexual Identity is only an issue because some choose to make it one when it need not be. The only attention that it really needs is petitioning to get those ridiculous laws that prevent same sex marriage removed so that we can be closer to equality.
TLDR: Hating someone for their sexual identity is even more silly than hating someone because of what type of car they drive and I used to be more of a ******* than I am now, I am just glad that I learned to open my eyes, even if only slightly.