Far be it from me to give dating advice, because if I say hi to someone hot and they not only hear me but also say it back, I consider that successful flirting.
However! Even from my incredibly limited vantage point, I can all but guarantee the same romantic lines that won over the likes of Elizabeth Bennet, Ophelia, and Catherine Earnshaw would not necessarily work out for you or I. The words just don’t have the same effect in real life as they do on the page, and also most of them were written two hundred years ago. So there’s that.
Were you to persist in using these fictional quotes in real-life situations, here is, to the best of my guessing ability, what would happen.