I do recommend that you keep the channel open between the two of you. Talk, email, communicate. Non one is almighty and there are times when people can't be helped. However, it always turns out that no support at all would have been worse. So all you have to do is be there, and listen, even if you have no answers.
By all means, keep communicating. Anguish and regret ALWAYS dwell in the folds of the unknown.