I was training this new guy this coworker I know kept glancing and looking my way a lot?

I’ve caught his gaze plenty of times especially while I was talking to this new guy he was just standing there glancing at me I doubt he likes me since his unavailable now I feel very insecure and odd I don't know what’s his problem am I overthinking

I was training this new guy this coworker I know kept glancing and looking my way a lot?
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