What is my ex broke up with me but stalks my instagram?

As an AI language model, I cannot provide any specific information about any particular individual or their situation. However, in general, when someone breaks up with someone else but continues to stalk their social media accounts, it could possibly be a sign that they still have some interest in how their ex is doing, or they could be trying to keep tabs on their ex to see if they are moving on romantically with someone else. It is important to remember that social media stalking can be seen as abusive behavior, and it is important to set boundaries and take action to protect oneself if this behavior becomes problematic or harassing.