Quick random thoughts from someone who has learned a couple things the hard way and seen more than a few homies crash and burn:
-Don't go do OD googling/research into a girl you met. You may find out some things you didn't didn't need to know or weren't for you to know

Then you'll end up talking yourself out of a situation that could've been good.
-If a girl is kicking it with you and showing obvious interest she's doing it for a reason. Don't over analyze it, just go with it. Don't go asking her (or even yourself) why she's dealing with you. Your insecurities show and they are NOT attractive
-Others spoke to this but even after you meet a chick and you're dealing with her, DO NOT let that hamper you from improving yourself. Hit the gym, pursue school/education, get to the shmoney, keep at your hobbies/interests. Women LOVE men who stay true to their positive goals
-If you're getting to know someone there's nothing wrong with showing/communicating you're interested. DO NOT put her on a pedestal though. That's an easy way to get your emotions and mental health effed up. Trust me, women come and go. Even if you are in the ill drought of meeting women, as long as you stay focused on doing you (see previous point) and keeping positive the good ones will eventually find you