Is he interested?

I bumped into this guy at work while I was leaving the canteen, and I smiled nervously because I did find him attractive. But I was also embarrassed for bumping into him so I quickly apologized.

He smiled back and apologized too, but as we walked away in opposite directions I couldn't help but look back, and to my surprise he also looked back.

Is it because he is interested or embarrassed? Should I try to talk to him next time I see him?

Is he interested?
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