If you would like to get to know him better, I would ask him things he can't shrug about or "not know" and when he looks at you across a room, I'd smile and maybe give a little wave instead of looking away.

I cannot picture the burned hand thing with a zillion people asking if you're all right and you "had to ask him for help". Why did you not get help from the others? If you kept telling everyone you were okay, he would have heard that; he isn't psychic knowing you need help with a particular task and it would be condescending of him to ask or try to help you if you just said you were okay and refused other people's help.

Sounds like you are not communicating with him clearly and just trying to guess about him from what you would do or think or say or imagine you would feel (wondering whether you have done something to make him angry). If you are interested in him (like it sounds to me because of all the attention you are giving him, noticing who he is talking to, etc.) then make that clear? You cannot know what he is thinking/feeling and you are in direct contact with us; our guesses are even that much more removed.