Heteromantic is a romantic orientation in which someone is romantically attracted to only a gender opposite or different from one’s own.
The sexual counter part is Heterosexual. The two differ in that heteromantic is the romantic attraction to only a gender opposite or different from one’s own. Heterosexual is the sexual attraction to only a gender opposite or different from one’s own. Some, individuals are both heteromantic and heterosexual in that they are both romantically and sexually attracted to only a gender opposite or different than their own.
There may or may not be a sexual attraction for the gender that the heteromantic person is romantically attracted to. A person can be heteromantic but asexual, bisexual, demisexual , heterosexual, homosexual, or pansexual.