Yeah, girls do seem to like it when you demonstrate how much you care. Just have to get your foot in the door first, with dates and small talk and jokes and stuff, so it grows naturally. Otherwise, especially if there's anxiety at play, it can feel creepily artificial and accelerated. Those are not attractive.
That's where romcoms mess up, the shorter movie runtime means they have to skip the legwork that would be necessary irl before reasonably showing feelings that strong.
Let's be honest though, guys been pulling dumb stunts for girls they really like (and vice versa too) for a very long time. That's real life, which romcoms are taking inspiration from. They just cut out all the dull parts and exaggerate the rest for comedy purposes.