and here's the thing - we don't see it here but the thing is she knows this isn't how you're supposed to fall in love. After this she comments on how she should've been more restrained, and how you have to be careful about just taking a mans word for it that he loves you (right down to saying that you shouldn't swear by something like the moon which literally changes every night) and that even says that being in love doesn't make her happy because it is "too rash, too sudden, too like the lightning which doth cease to strike ere one say sit lightens". For all the criticism thrown at her Juliet isn't actually an idiot. From what I can tell whenever someone falls in love at first sight in a Shakespeare play they or someone else says 'you can't fall in love that quickly' (even in one instance someone says that and then falls in love at first sight a few acts later) so they know that this isn't right but it still is because it's love.
