I've dated her three times, but I haven't heard back from her text messages these days. What happened?

It is possible that you have made up with your ex-boyfriend. Previous dates with you were empty. Finding someone who can talk doesn't necessarily deceive you and make you have an illusion. Only when a person is vulnerable, he will take the initiative to communicate with outsiders to alleviate the inner pain. When he is calm, he will no longer need the comfort and help of others. This is the selfish side of people.