Can we fall in love with a foreign friend?

Recently, I have met a guy from Ecuador
He's 25 I'm 24
We talk almost everyday
Just at nights, late nights
When we started talking
He asked me if I want to get married
I was like "Oh My GOD"
Is he crazy or something like that?
You know, if somebody makes you such a question
At the beginning of a conversation
You have two options: smile or cry
I did none of them
Because it's just the life
Right now, I'm thinking of him
I don't know what's happening
What's going on with me
The only thing that I know
Is that I want to know about him every single day
Even if there's nothing to say
Can we fall in love with a foreign friend?

I met him through Internet, not face to face