What can I do to help him through this while still following his wishes?

My boyfriend's Mom had a stoke the other day and he is having a really difficult time with it. I went to the hospital with him the night it happened and since then he doesn't want me to go with him anymore because he says he doesn't feel comfortable with me there. He doesn't like to discuss any family issues with anyone but I am worried about him. Im sure it is a very hard thing to deal with and keeping all those feelings to himself is not good. So what can I do to help him through this while still following his wishes of my not getting too involved?