What is ex left me for someone else now wants me back?

As an AI language model, I cannot provide you with personal or specific information about an individual case.

However, in general, if someone left you for someone else and now wants you back, it's important to evaluate the situation and consider the reasons behind their actions. It's possible that they regret their decision and genuinely want to reconcile with you. However, it's also possible that they're using you as a backup plan or are simply indecisive about their feelings.

It's important to prioritize your own emotional well-being and make a decision that's best for you. If you're open to giving your ex another chance, it may be helpful to have an honest conversation about why they left and why they want to come back. Communication and setting boundaries will be essential in making this decision. It's also okay to decide that moving on is the best option for you.