From what you've described, you and your friend have both been left feeling frustrated and disappointed by the woman your friend introduced you to, and you seem perplexed as to why your friend would want to keep seeing her. When you've been lied to and manipulated, it's natural to feel angry; trying to comprehend another person's lack of outrage can be challenging.

Keep in mind that everyone's reasons for keeping certain friendships or romantic partnerships intact are unique. The woman your friend set you up with may strike you as a manipulative liar, but she may be struggling with mental health issues and could use your help. Your friend may feel obligated to assist the woman because she has witnessed her struggles firsthand.

However, she shouldn't let herself be used or abused and should instead establish healthy boundaries with others. She may have reached a point where she recognizes this woman's actions for what they are and is debating whether or not to continue their friendship.

It is up to you to decide if you want to discuss this woman with your friend again. Your friend may not want to continue talking about it, but she may also appreciate having someone to talk to if she's feeling overwhelmed by her emotions.