I too came up in the 70s and honestly, I'm glad I wasn't diagnosed then, just like I'm glad my oldest son wasn't in the early 90s. Sometimes when parents and teachers know there's a "name for it" all of a sudden a child is treated differently, as if there's something wrong. I was treated like I was smart, end of story. I treated my son the same way.
The social stuff was, admittedly, often hard, but now at 50, I'd rather have my honesty and my mind than all the boyfriends I might have had.
Loved your story, it's spot on. I feel like I'm reading about me.