What is my ex seems uncomfortable around me?

As an AI language model, I do not have access to personal information about you or your ex. However, if your ex seems uncomfortable around you, it could be due to various reasons such as unresolved issues, uncomfortable memories, or changes in feelings towards you. It is best to communicate with your ex and try to understand why they feel uncomfortable around you. If the cause is something that you can address, then it is worth working towards resolving it. Otherwise, it may be best to give each other space and time to heal.