[header] How to stop being possessive about a friend [title] Analyze your behavior. [step] Look for the root cause of the problem by reviewing instances in which you behaved or felt possessively about your friendship. Try to make connections between the situations to see if you can find some kind of common ground that might be acting as a trigger for your possessive behavior. 
[substeps] Consider ways you might avoid these triggers and try to move forward. For example, you may discover that most of your possessive feelings arise when you are hanging out in a group of three because you often feel excluded when there are only two other people.