How do I tell.......? (Teenaged Guys and Girls please)

I'm not really good with girls... I always was shy. I liked some girls, but never told them. Last year, I really fell for one. She was really nice to me, specially nice to me, it seemed, and I never had the guts to tell her I liked her. One saturday moring, I was still drowzy, I picked up my cellphone and thought "what the heck, what dammage can it make, so many people say it"... and sent her a text message telling I liked her. She didn't answer. In the afternoon, I sent another message asking for her to answer. She said "what do you want me to say?"... I should've said I wanted to know if she liked me, but I'd used up all my courage ^^... I told her I just wanted her to know. Monday in school both of us didn't mention it, and even talked like normal schoolmates. We never talked about it again, and she acts pretty normally to me, like she's even forgotten it. Actually, I apreciate it, pretending it didn't hapen was easy, and we are normal friends. This is my story, lol, I know, I'm a wuss... ^^; But I think you should tell her... at least try and get the courage.