There is magic in this story, it has a dream-like feeling that makes the most improbable things happen so naturally.
I adore the way you make us readers feel the story step by step, guiding us through the scenes until we are alone and have to imagine the rest; it's a gift to be able to build up our own perfect ending based on your wonderful writing.
Personally, I think Severus will tell Harry, but it will take him some time. And it will be too late for both to un-fall in love.