Potentially, Harry could remain in the dream world in the sense that he might visit it every time he goes to sleep. But yes, he probably would grow away from the Draco in it once the trial is over, unless they become lovers.

The ones you mentioned are two that are fairly likely to get written.

I think I'm an author who needs to write, because when I don't write I get first restless and then depressed. The depression got steadily worse at one point in the past where I didn't write anything for six months. So I think I need to write for my own mental health. I don't necessarily need to post everything, though.