Love at the 1st sight

Does anyone believe in love at the first sight? Until few weeks ago I used to say that it was not really realistic.
Nevertheless, I'm met a guy thanks a friend, and after few days we went out. This guy is incredible. I'm wondering if it is only the beginning, or if it is love at the first sight?
The first time I've met him, I came in a Coffee Bar and his eyes was on me. I don't know what's happened during five seconds, I was totally unable to look somewhere else.
Before him, my friend used to say that I was a cold person, unable to believe in Men(sorry for those who may read me!!!), but now, I'm totally different even if I don't know the person, I'm not anymore so agressive, I take things easy (uhmmm, not everything!!!)

Please tell me if one of you know anything about love at the first sight if u believe in it. May be my story is not love at first sight, but this feeling, inside me, is incredible

I'm looking for your answers, see u soon