Emotional harm can be hard to name and easy to dismiss. We know when we've been physically hit, but emotional is really different. All sorts of things can cause emotional harm... what can we do to protect ourselves from it?
I find ageing has REALLY helped with this. I don't care so much what people think or if I fit in, I'm me and I'm ok with that. I also find nice people always like me cos I'm also nice, so people that dislike me or mistreat me often just aren't nice people at all.
I'm waaaayyy better at spotting bullies and good people nowadays. I stay away from the bad, don't tell them anything and join the good for safety. That really helps.
I've got better techniques for dealing with things, for example "can you explain that joke?" when someone is being nasty.
Aging does help! It's pretty freeing to care so little what others think.
I have the opposite problem: I have a hard time letting others get close to me. I'm very emotionally closed-off and as a result most of my friendships have been pretty surface-level. How the heck do you figure out who is safe to be emotionally vulnerable with?