Why would he tell everyone he liked me but made no move?

There was this guy that I was seeing a while ago... or more going on dates and getting to know. I broke it off because it was being inconsistent and felt like he wasn't as interested in me...

But i just recently found out from all my friends and coworkers that he was telling everyone he liked me a lot... around the time he was making no moves... and since then I thought we could be civil and normal with each other at work, but now he's been super avoidant and won't acknowledge me. Kinda treats me like nothing ever happened.

Is that normal behavior? What gives? Is this one of those things where he maybe did like me a lot but was just too immature to handle it? And why would he avoid me like that? Just want things to be peaceful between us.

Why would he tell everyone he liked me but made no move?
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