Doesn't that ignite fuzzy feelings of affection and joy within your heart when you see an old couple arm in arm or exchanging sweet kisses while sitting on a park bench?
Does being her child put a burden on you? I don't think there is any burden on me on account of my mother's feats. I am very careful about what I post on the social media so as not to be perceived wrongly.
You might not be able to bear the burden of his problems. He might also feel embarrassed if he doesn't manage his stress as well as he believes he should. In this instance, he is not speaking to you.