What is my ex contacted me after 3 months?

As an AI language model, I do not have any information about your personal life unless you provide me with more context. However, in general, if your ex contacted you after three months, it could be a sign that they are still interested in maintaining a relationship or they could simply be checking in. It can be useful to analyze your feelings and motivations before responding or engaging with them to ensure that you are making a decision that is best for yourself.