Sexuality is fluid.
Don’t get pissy because a lesbian ends up dating a male. Don’t get mad because your gay male best friend found a female and dates her. Don’t get mad because your straight male friend dates a dude or a straight female dates another female.
Love is love. Just because you classify as something does not mean in the next 30 years you wont find someone that is not in your range of what you like.
And stop fucking bashing on bisexuals just because they wont “choose” they don’t want to limit themselves and that shouldn’t be a fucking problem.