I’m sorry about what happened to your friend regarding her therapist, and for all the spirit crushing messages you got given as a child. Your mother is one person, there will be many people who will think you’re the best thing since sliced bread.
I don’t tolerate unkindness very well. I have been told to be forgiving, but I’ll admit I’m very picky about who I forgive, because some people just do not deserve it, and their emotional comfort isn’t any more precious or worthy of preserving than mine is. I might not say anything at the time, but I will put barriers up later.