Here's what equality would be.
Someone who is heterosexual is treated the same as someone who is homosexual/bisexual/asexual/etc.
I honestly don't think people always make such a big deal about being heterosexual though? Like, people don't go around shouting "I'm straight!" because it's considered to be the "norm" (kinda stupid but whatever I guess). So if someone says "I'm gay", that's great, but it's almost like, if you're constantly shouting out about how you're gay or whatever, you're kind of expecting some sorta special treatment (or rather implying it, you may not actually want that, but that's how it comes across). Surely the ideal would be: someone is gay and that's okay because people are accepting of it so we don't need to make a big deal about other peoples sexualities because it's NORMAL. Constantly shouting about how you're gay or whatever kind of makes it seem like it's something abnormal and strange. I don't like shouting about how I'm bisexual because I don't want people to start treating me as if I'm different because of it? Our sexualities are just a part of who we are, it doesn't change our identities or personalities which are considerably more important, so in an ideal world people should just accept someone no matter who they're sexually attracted to. Sorry, I can't express my point eloquently so some things haven't come out the way I wanted to but I hope you get my gist.