Is he not attracted to me since his pupils did not dilate?

The room was not that light.. he has blue eyes so I can tell his pupils were normal size ( not dilated). is he uninterested? I mean he was smiling a little when we were talking because I was checking his face out when he talked to me.. I was being awkward cause i like him... maybe he was being nice
Is he not attracted to me since his pupils did not dilate?
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