Need some help please?

[cici]

Hm, it's still early, so I'm not sure if she's not interested in you (and is talking to you online out of boredom/politeness) or if she's kind of interested, but not sure yet, or if she just wasn't free that time.
I would keep talking with her, and then ask her to hang out another time. Maybe ask her for a date?
To what extent do you not know her? Like do you have any mutual friends? How did you meet? Do you go to the same school? If you ask her for a date, you might want to have it during the day instead of at night, so she might feel safer. A group hang out thing is a good idea, but you might want to give her more head's up so she can have time to find a friend to go with her, so that she has a buddy.
I don't know if she was actually not free (this could be the honest reason) or she didn't want to go out, or she didn't want to hang out in a group with your friends, or it was too short notice.
I don't think there's enough to go on to know what's in her head.