Why do we exist?

1.

Lost in his thoughts day and night.
I hope he didn't caught me staring at him(?)
I kinda hope he did though.
(which he did ofc)

What is love? How would I know if what I'm feeling is what this world labels as "love"?
What is that feeling? Am I feeling it again?
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Few years back I was talking to a guy let's call him K. That time I believed that I'm in love. Maybe I was? Let's take him as my first love.
Our conversation lasted merely some weeks, and trust me when I say we never had any physical contact except for one handshake that I still so vividly remember. But even in those numbered days I felt somethings I never felt for anybody else. He was the perfect ideal man I ever wanted (or I assumed him to be) we didn't get to that point where I would know if my intuitions about him were right or not. We stopped talking (how? I didn't text him first this time :) and soon after that I blocked him).
Our ego ruined everything.
Even after some months had passed I found myself thinking about him (and since we were in same college I knew I would have to see him which made it difficult for me to get out of his thoughts). It was not one sided. I know he went through the same phase as me. But that was long ago...
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Now, we both are well placed in our jobs and coincidentally we are in the same city.
I have moved on. Maybe because I found someone better? :)