Those two fish are definately liking each other.............I have seen the complete opposite happen many times before where the female ends up dead...........The female is following him around, and the maleis flaring his gills in a non threatening manner to her.........One sure sign this is a bonding pair is the male is not snapping and biting her..........I would place an egg crate by the tank in case the male turns on her............If there is an extra aquarium laying around, then set it up for the female in case of the bad happening..........