Ruffle and ribbon yarns are all the rage right now, but you don't have to stick to scarves made of novelty yarns! There are many beautiful free crochet patterns that feature ruffles and frilly details, and since it's the season of romance and flirtation, it's time to take a closer look! Here are 10 free ruffle crochet patterns to tickle your hook! 10 Free Ruffle Crochet Patterns City Neckwarmer by Donna Rutledge-Okoro, a Ravelry download: This pattern has been catching my eye lately, and…