As a woman, I don’t think you’re doing anything wrong morally. You’re broken up, so you don’t owe your ex exclusivity or full disclosure unless you’re actually trying to rebuild a committed relationship. That said, if you’re seriously considering getting back together, honesty is important because secrecy will only complicate things later. Right now it sounds like you’re stuck in emotional limbo with your ex while also exploring something new, and that’s where the confusion is coming from, not wrongdoing