[If you mean for his “living” form, it involves a lot of staring and touching. He’s incredibly touch starved and wants to take in everything about his friends and loved ones. The feeling of their skin, their smell, the texture of their hair, and how clear they look through his eyes.
He’ll also ask his friends to go out and do physical things with him, such as going on hikes or just enjoying a warm evening to feel breeze on his face and the grass under his feet. He might not talk much when he’s absorbed like that (not to mention how used to just not talking to people other than Harona at this point) but he shows his love by sharing time with people.
If you mean for when he is a puppet, then he spends a lot of his time doing more tactile things with those he loves! He’ll talk to Harona while she works (as she is the only troll who can hear him) or try his hardest to help her bake, but with any other trolls he will spend a lot of time making crayon art with his shaky hands. If he really trusts the person he’s with, he’ll let them “play” with him and move him around. This is mostly reserved for Harona and Venter though since he hates it when people he doesn’t consider his friends treating him like the puppet he physically is.]