(For this one I'm not including characters who would presumably not openly show affection. Those characters were part of a similar preference found in the next chapter.)
Bilbo: He brings you tea and cookies and reads to you by the fire. When you fall asleep against him he pulls a blanket over the two of you and smiles down at you.
Fili: He keeps an arm around you whenever possible, kissing your cheek just to see you blush.
Kili: He holds your hand, your fingers intertwined, and kisses your cheek before pretending he didn't do anything. When he sees you turn your head to look at him he gives you an innocent look before he winks at you and gives you a quick peck on the lips.
Bofur: He sings love songs he's written for you all the time just to see you smile.
Bombur: He bakes you sweets and treats all the time. When you help him bake he lets you eat the left over chocolate and batter.
Dori: He picks you flowers whenever you go for walks together.
Nori: He steals you little trinkets even though you tell him not to. He calls you a hypocrite. When you ask him what he means by that he tells you that you stole his heart.