I agree - if you just let her sleep on your floor with no drama she will tire of it. There's to much going on at night with walking her back, rubbing her, sitting with her, it's way too social. I wouldn't do the walking her back myself, I think it's too social and inviting a power struggle. If she knows she can sleep in your room she can make that choice; leave her door open and your door open but don't talk to her other than to say 'lie down and sleep Madi'. If she wakes looking for you, just make a small sigh like Deb says so that it reminds her you are there (although I think she knows this already) and ignore everything else she does.
If you really want her in her own bed, then you can go the route of walking her back, but keep in mind it takes full resolve and you must not deviate from it. If you walk her back for an hour and then give in, it will only make her that much more determined to keep working at it. It's called random reinforcement and it's the strongest kind there is. We are programmed to respond to it, just ask the mice in the experiments lol. She's not actually being stubborn, she's just following our innate programming. If every time she tries it out something different happens, she has to keep testing her theories - it's how they learn about the world.
Sabs sorry this is so hard on you (((hugs)))