If it were up to us, we'd dress in a costume every day. So when October finally arrives, and it comes time to choose that winning Halloween lewk, we definitely do not eff around. We've compiled 120 (!!) of our favorite couples costume ideas for besties and lovers alike! Bonus: They're all Brit + Co originals! Scroll on for a wide variety of the most unusual and the most classic couple's Halloween costume ideas that are sure to get you and yours feeling wildly inspired and ready to double…