Someone who is romantically attracted to the opposite gender, but does not feel any sexual attraction towards them, and who has sexual attraction towards the same gender
Joe: Hey bro, I bet you could fuck her if you wanted!
Josh: Nah, not interested in females. At least not having sex with them.
Joe: Wait, so are you gay?
Josh: No, I feel romantic feelings for girls, But I don't want to have sex with them. But I am willing to have sex with another male.
When you fall in love with someone of the opposite sex, yet have no sexual attraction to them. Usually happens between women and their gays.
Gay guy: something weird happened
Gay guy: i believe ive fallen in love with her
Gay guy: but
Gay guy: no sexual desire
Guy friend: yea right
Gay: i just love being with erh
Gay: her
Guy friend: so it's likkkkeeeeeee
Guy friend: a bromance, except....
Guy friend: a heteromance??
Gay: she is so awesom