WWhats it mean if my 40 year ols work crush seemed to say hi back in a small voice but his eyes seemed to look at me for a half second or more long?

So its longer than is usual for a greeting.

Years ago he said that i must have tons of guys texting me and i must get tired of them all.
WWhats it mean if my 40 year ols work crush seemed to say hi back in a small voice but his eyes seemed to look at me for a half second or more long?
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