Taking things slow
More time + less sex = more beta
Of course, not every guy can get a girl to sleep with him on the first meet. But that should always be your goal. Why care about anything else but SEX with a 19 year old??? Do you care about her MIND? HAH! She's 19! Treat her like a piece of meat - that's how she wants to be treated. Two steps forward, one step back, repeat until the deal is done. What would George Clooney do? (WWGCD)
I suppose you could take her on a "date," but my feeling is that she'd think this was just some B.S. cover up of what it is you really want to do.