[header] How to avoid becoming a " psycho ex " [title] Establish boundaries of communication. [step] Depending on the nature of the break-up, you and your ex need to establish some ground rules about communication going forward. While you may want to talk or contact them still, listen to what your ex says. 
If they are ignoring you, they likely do not want to communicate. [substeps] Consider asking questions to find out what the boundaries are.