Flirting or fighting with me?

[Ducklets1999]

You'd typically want 4+ females per male, so yes I would get a few more girls for him, both to keep him off of non-duck things and also to give your girl a bit of a break. If left at a 1:1 ratio he could seriously hurt or kill her trying to mate her so much, especially if/when he figures out anything else he's trying to mount isnt a duck and loses interest with that.

wouldn’t that result in fighting...

 

[Duck mommy 2019]

wouldn’t that result in fighting...

ducks don’t pair up. males will breed all the females as much as possible. i have one drake in with my two girls, then my older boys are with just each other and try to mate with each other and people

 

[LT71689]

wouldn’t that result in fighting...

Nope. They might be a bit standoffish towards the newcomers for a few days just because they're strangers, but the girls dont get territorial over the boys.

If you dont get more girls your existing girl is in for a rough time.