You might know the answers to sime of the questions already, and you might not care what the answers will be - the point is tomget her to text something back - anything at all.
Your buddy and her buddy might be just trying to set you 2 guys up. He's tokd you that she likes you, and she'smtold her you like her.
You're both interested but now she's waiting for you to do something about it.
There's a few possibilities of what's really going on - including the one where she just wants a jump from anyone, and if you don't make a move some other random asshoke will say hi in the supermarket and your chance is gone.
She might just really like you and think if she lets it be known she's easy. then you will make a move on her. Either way - whatever the underlying reason, you have to say "something"
Good luck