Do I tell him physically? Hard to tell someone physically when you don't touch them.
Okay I understand his lack of PDA is part of his persona for what ever reason. But what is your reason for not touching him? Simple things like when you are walking by him and say something to him touching his arm while you speak. Putting your hand on his chest when you sleep or my favorite putting my feet against H's legs (My feet are always cold lol).
How can you expect him to walk out of his comfort zone if you are not inviting him to.
I am very forward sexually when I want sex, Everyone here that knows me could attest to that. And I am going to ask you a simple question that is very personal. Have ya ever just plopped down on the bed when he is lying there and started giving him a BJ or jumped in the shower with him and not offered but just taken the soap and washed his lower region. Ever leaned over at a red light and just gave him a passionate kiss. No talk just do. Actions speak louder then words sweetie. His response may be shock at first but your kicking his butt right out of his comfort zone.