A man who sacrificed his two eyes for someone else to see is not considered nice but gullible.

By vacating your bed, you relinquished your authority to her.

And it is obvious you don't know how power play work. Or how to instill discipline on people or make people give you your own respect.

Please don't misquote my advice as telling you not to be nice or good.

Way forward
Do not run away from your room because of anyone. Go back there and reclaim your bed and everything.

Do not allow her to sleep with you even for a night (strict warning there is a reason for this)
Don't try to save the friendship or work things out with her let her find time to pack her things.

Do yourself a favor and read few pages on 48 laws of power to quickly realise where you made mistake and limit of sacrifice you can offer anyone.

For more advice on any matters, I have an advice running group so you can message me on WhatsApp +2348027024393 (Ortintin is my name)

Seriously the guy made a big mistake by vacating his bed.
I'm glad he's finally seeing the light!