Ohh, if you are able to read sad fic ("A Different Fate" is poignant but more uplifting, imho), look at All Through The Night - it's centred around Petunia and her motherly feelings for Harry. I'd almost picked it as my personal favourite.

And I'm so flattered <3 Thank you. Writing "All That Remains" marked me too, because I realised that I was capable of plotting and world-building, not "only" fic centred completely around character/emotions.