Girl PROBLEM ME PLEASE!!!!!!!?

Okay so I met this girl by a friend who gave me her phone number, I sent her a text and from there we started talking well everything was doing good but she mentions that she likes somebody else but she is not sure yet. I am really worried about that cause this girl i started to like and i may think she likes me too because she said i was nice, sweet, and cute. Anyways so next day I text her but she didn't answer at all she leaves me in R (Blackberry messenger) it's been like a day she has not answered back. What should I do please help!