What do you feel, when you fall in love?

Question

Answer

Desire of seeing that particular face again and again.
It might get so intense to recognize her even in other faces.
What follows can only be understood by who knows the feeling, so it's not
much use to tell about it, especially in my poor words.
Much better words have been used, like those in the song 'The Train'
by Nick Cave 
(link: https://www.youtube.com/watch?v=4PcAO1YBYt4&index=8&list=PL7754BF6C8EF9197A)
or 'Lime Tree  harbor' (also by Nick Cave)
link: https://www.youtube.com/watch?v=u6FVYLnxqbo

Answer

I don't remember. It happend long long time ago ...or it has actually never happend to me yet?

Answer

You feel that your real existence, feel you are living ; also by the way you are getting vanished.. dying..

Answer

You feel a dream like state in which the world around   you  seems  to be  not reality at all.

Answer

"A guy with a pin to burst your bubble?" :)

(Heh... close enough...)
https://www.youtube.com/watch?v=FzQBOBoPg04