What does it mean when your ex boyfriend stares at you?

supergirl2380
It's been over for 15 months. I love him more than ever. We haven't spoken a word since the split and it was pretty ugly. I have seen him 5 times at the club since October. He just sits there staring at me all night. I pretend not to notice, but I do. I don't have the courage to talk to him because it still hurts. He kept walking past me and stood right in front, in back, and across from me the times I saw him. Why is he doing this?
What does it mean when your ex boyfriend stares at you?
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