Should I Text Her Or Just Up?

There's a girl that I've liked for long time (as in 3 years) and I've only just recently showed her how I felt about her. I did it by asking her to a movie (typing the question in my iPhone's contacts) one day afterschool as she was about to leave. She smiled and told me that it was really cool and sweet and that she would think about it. We started texting after my friends "encouraged" me enough. Fast-forward a couple weeks, and we're still at square one only her friends, my friends, and some people I've never met now know about it. The main problem being she still hasn't answered me and I feel like she tries harder and harder to ignore me. Soon after we started texting I lost service to my phone which made it even harder to talk to her. Now I have service again and I was wondering if I should try to text her again. Everyone that I know who knows her knows that she the nicest person in the world (sorry about all the "knows"), but I still like her and don't wanna lose her.
P.S. I left out some details and occurrences but that's the gist of it I guess.

Added (1). *Just Give Up*

Honest opinion here. Why don't you try calling? Or try a good morning don't ask anything just be formal say something that doesn't require her to respond. Don't be so forward. Talk to her in person. If she likes you she'll spend some time with you if she doesn't she will rush off as in a hurry to get away from you. Honestly women are a mystery and whoever says they have it down pat is a liar.

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