The most electric romantic exchanges are not declarations of love; they are misunderstandings, double-entendres, and competitive banter. Think of the dueling quotes in The Philadelphia Story or the bar scene in Good Will Hunting . People in love often say the opposite of what they mean.
Don't describe how handsome the love interest is. Describe what the protagonist is afraid of. Does she fear abandonment? Then give her a partner who needs space. Does he fear being controlled? Then give him a partner who is fiercely independent. The conflict is baked into the character design.
So go ahead. Write your story. Watch your story. But most importantly—live your story with your eyes wide open. The best relationship is not a storyline. It is a reality you build, one messy, wonderful scene at a time.