Where does she often go? What do you usually do? Favorite thing, food? For fun? Who is your friend? Do you have a boyfriend? Who has a secret crush on?

Countermeasures: Start with friends around her and dare not contact her, then you must please her friends, because only they can provide a full set of information.

It's more natural to make friends with her friends. The point is: never make your purpose too obvious.

Here's what I did: I won every battle in college.