I definitely wouldn't ask your nephew about those things. I'm sure he has good and bad memories of his mother, but has his own way of dealing with those feelings. People work hard to move on from things like that and you would only be causing him pain.
I have had years of therapy. I saw a great therapist for about 7 years. I think that it mostly helped to have someone to talk to. I have a great deal of insight of my own, and I think that at times she helped me
use it. The therapist I've seen recently is a very, very nice person, but is not helpful at all, she actually makes things worse, and I see absolutely no point in going, so I don't.
Therapy isn't for everyone. You have to be willing, and the right therapist makes a big difference.
Congratulations on losing the pound Bobby!