I’m 69, sometimes I just want to be off by myself but I’ve never acted on it — your position made me think what that might do.
When you see your dad, tell him that the old guy on this site was thinking of him.
Hug him tight, then kick his butt — not too hard, you hear?
Nothing wrong with going off to be by yourself. Just keep those who love you informed. If you don't wish to tell them where you'll be, at least tell them what you are doing, and when you expect to return to the world. Otherwise, they'll worry. A lot. Might even call the police to look for you. :)