A girl doesn't text me? What do I do?

[Jonthan-_-]

http://answers.yahoo.com/question/index;...847AArHtYY

Well, I've been hanging out with this girl since last year (Read the above for more)

And well I always hang out with her at lunch and in one of our classes we have together, but she never texts me...

And on facebook, I said hey earlier and she replied but after I replied back to her She never replied back and she saw the message since it tells you on facebook....

She went offline and then came back online... I assumed she would reply back but she never did....
She talked to other people on her profile and that pretty much ruined my day since I thought I bored her or something just because she ignored me there...

but at school is another story because that's where she talks to me...

What does this mean?? What should I do?