What did eye contact mean in this situation?

I had a brief emotional affair with this man a few years ago. Nothing serious. We remained friends but not as close as before. Yesterday we both were at one event and I was sitting at the table across from him. A few times I felt and noticed that he was looking at me. When I looked at him he maintained eye contact for a few seconds and then looked away. It has been a long time since he did that last time. Now he usually avoids eye contact that lasts longer than a blink.

What did eye contact mean in this situation?
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