I once read in a fanfic (unfortunately, I don't remember which one) that Harry was having a nervous breakdown, a panic attack, or something like that at Hogwarts, so he ran to the Room of Requirement in search of something that would make him feel safe so he could calm down. What did the room offer him? The CLOSET(!!!!) where he used to live
That's when Harry realized that the closet was the place where he felt safest. Uncle Vernon couldn't fit in there = no beatings. Aunt Petunia was disgusted by it, and Dudley didn't even bother (I think?) And, of course, there were no magical things (read: people) that would try to kill him. Nothing bad ever got in there. It was just him and his little space
I cried with him while he was crying in there, missing his closet (HIS CLOSET!)
