Good work dude. You didn't scare her off yet
Now, in a situation like this, it is possible to be covert without being manipulative or without showing your hand. Ask her about past relationships, ask about career plans, does she want kids, etc. None of this has to be in relation to you, but her answers will give you insight as to where she is. If her career plans include joining the Peace Corp, then you may not want to get serious just yet, know what I mean?
Also, I find being blunt is the best policy. Just come out and say it. pornclerk had great phrasing, feel free to use that if you want.
But yes, if its only been a couple of weeks, then just enjoy what you got. Trust me, I know what it's like being a guy and being totally infatuated with a chick. It's hard to not be all ga-ga over them, but to a certain degree... you just gotta be cool. A lot of modern women do not want a clingy guy. Of course, everyone is different, so you gotta go with what your gut tells you. Just don't get to serious to quickly.