A man charged with fatally stabbing a love rival had lured his victim to his East Village apartment with a false promise they’d “settle it like men,” prosecutors said today.

Instead, Jairo Pastoressa, 25, “sliced the victim in the neck, and as the victim turned away, stabbed him in the back” in the apartment on East 7th Street near Avenue D, Assistant District Attorney Caitlin Nolan told a Manhattan Criminal Court judge in successfully asking that Pastoressa be held without bail.

The victim, Christopher Jusko, was unarmed and “made no physical actions against the defendant,” Nolan said.

But Pastoressa’s lawyer, Spiro Ferris, insisted that his client may have been acting in self-defense during the argument.