Guys, what is the sweetest thing your girlfriend has ever done for you on a random day.(No holidays)

So My Boyfriend is the sweetest thing ever, and he is always doing things for me. I want to pay him back and do something for him. Something he would really like but not over the top or anything. Any ideas, stories, or preferences? HELP
Guys, what is the sweetest thing your girlfriend has ever done for you on a random day.(No holidays)
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