GIRLS PLZ HELP!!!! why didnt she say hi to me?

Just ask her if you did something wrong. Being direct is the best approach. If she won't talk to you, talk to her. Stop by her locker and say, "we haven't talked lately. How are you?" during that conversation or the next, ask her out. Wait to ask her to be your gf until the date. Good Luck! let me know how it turns out? limey10@ymail.com