What was this likely to mean?

A guy who I’ll call *Ken* reached out to me to talk online, after years of no contact and telling mutual friends that we don’t see eye to eye. We’re acquaintances now and sorted out our differences.

I’ve noticed that he’s driven past my street, honked his horn and waved to me on his way past, 4 days ago and he boarded my bus last night, sitting in front of me, then turning around and looking me directly in the face. Inches away, then looking away. Then he nodded at me after he got off the bus and walked off, when I glanced over at him. Both of us are autistic.

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Was it random coincidence that he happened to be around, or do guys do that on purpose?
What was this likely to mean?
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