<human>: My friend is a very nice guy, who is sweet to everyone. When I am sitting next to him, I will lean my head on his shoulder. He does lean his own head on top of mine when he isn't overly focused on another task (i.e. if his video game isn't too intense). I worry that I could just be a bother to him, as I am essentially using him as a pillow for hours at a time and he may be too nice to let me know that I'm being annoying. He makes me super comfortable, and I feel genuinely safe leaning on him. I don't want to overdo it, especially since I kinda napped on him several hours yesterday. How can I know if I do it too much?

Can you condense the text into a few key points?
<bot>: My friend is really nice and lets me nap on him, but I'm worried he is too nice to let me know if I do it to much.