That's what this feral kitten that I last had would do, purr in my arm pit, eventually in my arms and lap, and while she ate, but the minute I let go, she was off and running and wanted to be with my cats but nothing to do with me! Sigh...Keep him caged with his brother and let him see how much his brother enjoys your attention. It works. Have you ever noticed when your giving one cat lots of pets and attention, someone else comes around, then someone else, eventually a few? They have the capacity (science has just acknowledged) for empathy. Cats can see their peers recieving love and know what that feels like! (and other emotions). Keep us posted!