Yeah, sometimes we can't share things out of external consideration. Maybe it'll help to write him a letter or to talk to him out loud or in your mind. I'm sure he'll receive the messageI have regrets. There are SO many things I wish I'd been able to talk with Dad about, but I always remained mindful of boundaries, external consideration etc. But we have always been a tight-knit family, I'm sure he's feeling relief and love on 5d now.
