What does it mean when a complicated ex is caught staring?

He broke up with me and it was a complicated breakup but at the end of the day what i heard that is was not his idea in the first place. We had been broken up for a couple months now and a few weeks into the break up i was blocked which led me to thinking he wants nothing to do with me, but recently we were both in the same event and I just ignored him because considering i thought he wanted nothing to do with me i wanted to respect that but during the day i was told by multiple people that he was staring for long period of times. So i want to know that why would he still be staring what does it mean?

What does it mean when a complicated ex is caught staring?
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