Fuzzybear,
For me, there is nothing worse than invalidation. I posted in the Rate and Review section of this site a wonderful book called "Nasty People-How To Stop Being Hurt By Them Without Becoming One Of Them" by Jay Carter. This book is all about invalidation.
When I posted it in Rate and Review, the words got kind of jumbled because I was trying to write the publisher's name and it was too long to fit. I got the book at Barnes and Noble, and you may be able to find it on their website.
I know how hard it is when you do not feel validated.
Love,
Sujin