What is my ex likes everything i post on facebook?

As an AI language model, I do not have access to personal information about your ex's behavior on social media. However, if your ex likes everything you post on Facebook, it could indicate a few things. Maybe they still have feelings for you or want to maintain a friendly relationship with you online. Alternatively, they may just enjoy your content or want to show support for what you post. Ultimately, the reason for their behavior is something that only they can answer.