Is she being inconsiderate?

Hi there everyone 

A childhood friend of mine is going to university near my mum's house, so my mum offered her free accommodation. She took my room and I was absolutely fine with it, since I attend uni in another city anyway. Whenever I came back to visit Mum, I would just sleep on the sofa for a few days then go back to my uni city.

The trouble is this - my friend said that she would be going to China during the summer to meet her fiance's family, so I assumed I would be getting my room back. I have a dissertation to write over the summer, as I am a master's student so having my own space is essential (not to mention that I'm quite introverted). Now all of a sudden she's not going to China anymore and I am stuck with no room. I have a big family, so the house is full during the summer holidays. I feel suffocated and very, very frustrated; this doesn't feel like home anymore and I would rather be elsewhere.

She also has family in London, who she isn't going to be staying with either, apparently.

Maybe your mom wants the two of you to spend the entire summer in the same room...

Honestly, if this isn't a set up by her to make you a couple, it's really weird. And your old friend is inconsiderate too. She should thank the free accommodation for the whole year and go home or somewhere else while you're there. 

I think she has no shame about it, and is taking advantage of your mother kindness and I think she is planning to stay there as long as possible. Tell her to get out from your damn room and to go to sleep at the sofa.