Honestly, I don't believe in love at first, rather, I believe that there's such things as infatuation at first sight. I remember I have been very much attracted to a guy the moment I first laid my eyes on him. He became my huge crush in school. I would always feel happy whenever I would see him around campus. I would feel sad whenever I would find him talking to other girls.
May answer is yes and no. I had experienced love at first sight several times and they all proved to be false except for one which retained my affection even after he became my boyfriend. Unfortunately, the relationship did not flourish. With love at first sight, my advice would be to be discerning with your feelings because you may be acting like a fan of a celebrity who is blinded. The trick is to find the human in him, that means his faults and his deficits like if he is short or if he is not articulate. Nevertheless, it's a good feeling to be in love... at first sight.