What is ex girlfriend likes my facebook picture?

As an AI language model, I do not have any specific information about your ex-girlfriend or the context of her liking your Facebook picture. However, generally speaking, liking someone's Facebook picture can be a way for a person to show that they still have positive feelings towards the individual and want to engage with them in some way. It could also be a casual gesture with no significant meaning behind it. Ultimately, it would be best to take concrete actions based on your own feelings and intentions towards your ex-girlfriend rather than interpreting her actions on social media.