I don't know who you are and you don't know who I am. Don't want to hurt your feelings. This may sound like a cold shower but the girl tried to match you up with someone else. Women are very "calculating" when it comes to relationship and matters of the heart. There's a reason why she tried to match you up, she obviously thinks you are nice person (a good sign) and she obviously does not think of you, the same way you do of her. If she had somewhat of a thing for you (even if she is in a relationship) she would never set you up with someone else. You would have been the go to "guy", the rebound, the whatever... after her breakup.
Maybe I am wrong. Ask it never hurts. Just protect yourself (I mean emotionally) and don't go with your hopes to high.
Also this guy totally has a point. It's a coin flip on this one, if she was interested in your she could be calculating enough to not set you up with someone or she could just be really nice and didn't expect to be single. If she starts talking to you about other guys though, you're officially friendzoned and we all know there's no escaping the friendzone.