Chatting this girl on fb was going great but she didnt reply when i asked her for her number?

[petitehealth508]

I started chatting a girl i barely barely know on fb and it was going pretty well like she was putting smileys and ''xx'' and she seemed enjoying the convos. But then i asked if she had a phone because it would be more simple to text. She said yes and then i said.. does it come with a number? and then she didnt reply to that...and shes been on fb since i asked her that yesterday at 8:00 p.m. so i dont know what to do now.. i liked her picture.. but she wont reply to that last message, do i write another one? what should i say? do i say: it doesnt matter if you dont want to.. or do i wait?? what do i do to text me back thanks!