I relate to both Harry and Ginny so much here.

I thought it was funny that Harry ate the whole bag of candy. I'm not sure if this is something I can imagine him doing as an adult, but I don't care. It worked well here. Also, the fact that he was so pitiful afterwards, what a mood.

Ginny was lovely here. She clearly wasn't amused that Harry indulged a little too much, or that she would need to get more candy for the trick or treaters. Still, she was so sweet to Harry, making him tea and caring for him. She reminded me of her mother here.

I adore slice of life stories, and this was no exception. It was so simple and sweet, and it told such a lovely story. Excellent job.

cute

The last line was BLOODY BRILLIANT!
"I love you too. Even if you are sometimes insufferable."

Only another forgotten period I found...
Wrong: He was feeling bad enough
Right: He was feeling bad enough.

Happy Halloween! Terrific grammar too, only one forgotten period:

Wrong: “I’ll go make you some tea, how does that sound?” Ginny asked, softly
Right: “I’ll go make you some tea, how does that sound?” Ginny asked softly.

This was a bit odd, but it was cute

great job

Nice little story. Happy Halloween.