Well I don't mind if a guy secretly wants a serious relationship but confidently asks me for an outting.
In fact I don't really read into it all that much. If you like her, you like her. Flirt with her here and there. Just be sincere and you won't come of sleazy.
Just do what comes naturally.
Then again most girls my age are absolutely irritating and give you guys mixed messages so ordinarily you don't know what the hell.
Thus my advice means very little right now.