This is a wonderful comment @owasco (as usual!) :)
The way you refer to your marriage is a very mature one. I agree very much with you when you observe that the forever happily married idea is a mistaken one. People get married, conquer things and achieve great goals. Through that journey they transform. Sometimes that transformation means negotiations can still be made and the two lives can still go on together productively, lovingly. Sometimes not. And I suppose the secret is to be able to wisely identify which path to take.
How reassuring it must be to have a friend like your psychologist friend. A soul-mate friend! It's very difficult to obtain that sort of confidence and openness with a romantic partner, I think. There is too much at stake. It seems to me that in romantic relationships it's either about being completely honest or being completely accepted. Not sure. I will think a bit more about that one :)
As for the current meaning of platonic love. Although its original meaning has changed over the centuries, I don't think it's Ref. far from the concept put forward here.
Thank you very much dear @owasco for your support and for always meaningfully engaging with my work here.
All the best to you.