...wow. I'm... jealous. XD What have you done to me? XD
I used to have a chinese girlfriend, but we had to break up because her parents didn't want her to date europeans.
My advice to you; unless you're absolutely sure you can actually get serious with any chinese girl, talk to her about the parents approval thing and whatnot. For us non-asian people, it may be a hassle, but it'll pay off if you succeed.
As far as your problem goes, you're better off taking it easy. Don't jump to conclusions too fast, and try not to come off as pushy or otherwise annoying. If they are all interested in you, then you should definately take it easy and just let it all come to you. The chick with the most charisma, the one that catches your eye the most... go for it.