In Chu Qing's shoes, I'd just keep Hua Hua and friendzone the rest. What good are those complicated families behind the other girls? They seem more trouble than worth, and their personalities are disagreeable. It also wouldn't be fun knowing you are only one of their husbands, yet my sense of fairness would say that since I can't accept it in their case, they don't need to either in my case, so it's no good to even try.
However, Chu Qing isn't me, and he's clearly a horny monkey wanting to screw around a whole lot.