Moving on

My ex broke up with me a little over 2 weeks ago and I’m pretty sure he’s dating my “close friend” that I trusted everything with. I don’t know how to feel because I wanted to talk to her about it because she knows I still like him but whenever I talk about him and her she gets defensive. People say it’s as a joke and maybe I’m being childish but they’re already out here posted up on each other’s social media? I don’t know what to do. I know I should move on but she was someone I trusted and I’m so hurt, like hello?? Girl code!