He knew well enough that the stress you are having is from OCD. A specific kind and it was visible to him, even though you weren’t diagnosed and believed it. From all the papers you wasted because your handwriting wasn’t perfect to you having a full on panic attack do to not getting the bedsheets right. There is more events… like this specific moment. He was staying in your place as he was witnessing how you were so paranoid about the security of the house. You were just… fidgeting with your fingers while thinking deeply. He wasn’t sure how to help either to ease the overwhelming feeling you were having. Hey… I locked the doors and the windows are closed. He tried to reassure you but he knew well enough to know that it wouldn’t do much. He just saw you give him a nod before standing up to check if it’s true.