Learning about personality types really helped me understand my DD7.
She is an introvert, but she still likes being social. The effect is that she wears out quickly when around other people.

It was a great revelation to me to learn that she is actually using energy when being around people and gains energy during alone time.
too much social interaction = meltdown

It was a life changing lesson for us. Introverts don't always want to be alone but sometimes they need it even if they don't realize or want it.

I have since taught her to pay attention to her needs and realize when she need some quiet time, before having the meltdown.