My group T offered the first time. It was on my birthday and he asked if he could give me a hug for my birthday

now I occasionally ask him for a hug. After that one time it's always been initiated by me. Before the birthday hug he would occasionally pat me on the arm or back and I told him that I liked when he did that.
My one on one T has never hugged me. He's never touched me in any way. I'm worried he would say no and I would feel rejected so I don't ask. I wish I could hug him though.