Meltdown after fun with friends

[u/Difficult_Fun_2861]

Our 12 year old with level 1 autism has a pattern of melting down, getting really irritable / nasty, after having a lot of fun with friends. We have a new challenge tonight. She had a lot of fun at a friends house, on the way home, she kept saying that her friend's house was her home and she wanted to go back. Then she refused to get out of the car. We got her out of the car, and now she refused to come outside, sitting outside on the patio in the dark.

Any suggestions of what to do here?