Short term stay in Edinburgh

Hi there, I am Berend, final year medical student from London looking for a short term let accommodation in Edinburgh for 3 weeks from 27 August - 17 September for a GP placement. I am originally from the Netherlands, but have been living in the UK for 5 years now. I am looking for a double room, where I can have my girlfriend over for a couple of days but will be largely staying alone. I am working 9-5 during the week, and planning to explore Edinburgh and surroundings on the weekend. I am happy to socialise during the evenings, but also respect privacy and own space. I am a clean and respectful housemate.