The thing is, that’s actually the central issue of her tragedy. She can’t pick herself up and move on to a guy who actually cares about her. She’s stuck on the guy who doesn’t care for her and discards her like trash once he gets better, who cannot know or appreciate the depths of what she has sacrificed to enable his recovery.
This is, not coincidentally, the very thing that makes her appeal to the audience: it is a universally appreciated human foible.
So… good sentiment, but if it were at all possible, Sayaka would not be Sayaka.