If anyone were to guess your love language just by looking at you, they could tell it's physical touch. Some of the boys would notice your clingy behavior, with Leona you'd occasionally hold and fidget with his tail, at first he'd give you one stern look but after a while he stopped trying and let you do your thing, the same goes for Jack as well.
They find it cute and somewhat endearing the walk you'd unintentionally hold their hands when walking, Jamil found it surprisingly relaxing when you played with the end of his braided hair, though he wouldn't admit it. You did have a bad habit of leaning yourself on Riddle like an armrest, but he allowed it only if you were actually tired, Floyd especially found this amusing as you didn't mind his squeezes also as you got to touch his earring.
Malleus indeed took pleasure of your clingy natural as you'd usually hold the sleeve of his blazer whenever he's walking too fast, it was a way for you too keep up with him, or the time you fell asleep in Pomefiore on the couch holding unto Vil's arm snuggling into it as a form of comfort. Though on the outside Vil was neutral, he was jumping with joy in his heart.
All the boys could recount a moment with you being clingy, and it warms their hearts.