Yongguk - Yongguk would be the guy to compliment you in every way, shape, and form. Each compliment comments on how you are the closest thing to perfection and how he loves everything about you. There’d be times where he would hold you and say it right then and there. And on special occasions, he’d express himself through music. He would use his creative side to write you the most beautiful song describing how much you mean to him.
Himchan - By being cheesy of course. Okay, not cheesy. But romantic. It’d be obvious that you mean a lot to him just by the way he looks at you. But Himchan would want to make it even more obvious through words. He’d take you to a place with little to no people. It’d be a pretty place; maybe a park with cherry blossom trees, or maybe the beach at sunset, or maybe at a balcony overlooking the nighttime cityscape. Wherever it is, it’d be classically (and stereotypically) romantic. He’d grab your hand and just look at you with the most loving of smiles when he says, “I love you”.
Daehyun - You know you’re important the moment Daehyun shares food with you. jkjkjk No but seriously, Daehyun would show affection and expresses how much you mean to him by taking care of you. This would include putting food on your plate, walking with a protective hand on the small of your back, and shielding you from rain. There’d also be times where he’d just blab on how much he appreciates your existence. This is when Daehyun would be stupidly fluffy and borderline greasy with his choice or words in expressing his affection for you.
Youngjae - Youngjae would tell you this in a private place. You two would be at home and being cute on the couch when he goes, “Hey, you know you mean a lot to me. Right?”. It would start off like that and he’d start listing what he loves about you. He would go into detail of you how he thinks it’s cute when you talk to yourself and how he actually really likes it when you troll Daehyun with him. He’d eventually get more serious and tell you how you mean the world to him. He’d just play with your hair or smooth his thumb over your cheek when he tells you all of this.
Jongup - Jongup is a man of few words. He’s not the best at expressing himself through language, so he’d do little things to show his affection instead. This would include buying you trinkets because “it reminded me of you” or spending hours on cooking your favorite food since he “uh…burned the first few batches”. It be obvious that you mean a lot to him. He’d want to make you happy because hey, you are his special girl after all. It’s just that he sucks at expressing how much he loves you in words.
Zelo - Awwww, this would be ridiculously cute. Zelo would want to try something “unique”. He’d try to do something random like writing “I love you” on a cake or engraving your initials on a tree. But of course, with his luck Daehyun would eat the cake or the tree would suddenly fall down. So his attempt of expression would fail, forcing him to /gulp/ actually tell you face to face. Zelo would want to say I love you to your face. He would want to soooo badddd. It’s just that he’d be so nervous. He’d eventually muster up the courage as he gently calls your name, grabs your hand, and looks you in the eyes before blushing and looking away again. He’d quickly mumble a shy “I love you” before breaking out in a relieved smile and looking back to see your reaction.