Can you develop feelings for someone you have never met?

I've been talking to this guy through this site... and I think I've developed feelings for him... he knows what I look like and I know what he looks like, but that's all. we never cammed or met in person, we just talk. do you think it's possible? we've been talking for almost for a year now- longer than 99% of my past relationships.
Can you develop feelings for someone you have never met?
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