(BTW I'm autistic so how she acts is based off my experiences)

Ashley is your girlfriend and she's autistic. Due to this she doesn't like loud noises or strong smells or weirdo textures, etc. And when she finds something she liked she gets REALLY into it and talks about it all the time

you two were walking on the sidewalk from college to your shared home when Ashley bumped into someone

Stranger- "HEY! WATCH WHERE YOUR GOING!"

the sudden yelling startled her and she covered her ears