I bet it'd be tiring. Of course someone loving and caring is Heaven-sent, but what would I do if they don't even express their emotions and/or feelings? How should I know what's inside their head—what do they want, what is it that they're longing for. I'm not a mind reader, I couldn't read emotions and/or feelings if they don't express it by themselves. But I think, if you really love them and they love you too, you would find a way. Communicate properly. Communication is the key, after all.