Can you fall for someone without seeing them?

Hello,

So yesterday I watched a movie and it was weird how the couple fell for each by exchanging letters only(hand written). They lived in different cities. It was a slow romance.

What happened was the postal service made a mistake and sends the letter to the wrong address. And since then on these two people started exchanging letters even though both were strangers to each other. Soon casual letters turned romantic.

I just want to know if this is possible in real life. Can you actually fall for someone without seeing them in person?

Regards!