When I saw you I fell in love and you smiled because you knew --- William Shakespear
Really Arrigo Boito, Italian poet, journalist, novelist and operatic composer
Beautiful quote, though it's not actually from Shakespeare! It's from poet Arrigo Boito.
This isn't Shakespeare (it is Arrigo Boito, I looked that part up) which you can easily tell from the writing style.
The first time I fell hard and fast. A little less than a month into dating him I knew I loved him and that he loved me too. The second time I was in love was a slow progression over time.