Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Elders at that age have a lot of wisdom. You need to approach him and tell him what you want from him. Also learn to listen. Old people always like to be listened. Trigger him to talk about his happy yesteryear and watch him open his heart in front of you. Then, you have a bridge for you to walk over towards his heart. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck.