<human>: Can you give me a shortened version of the text?

So, a little backstory. I was part of a research study where this girl was conducting it over the course of 5 days from M-F. We hit it off, and had breakfast on Wednesday. I asked her out on Friday, which she agreed to and gave me her email address as she just came over from England.

5 days after sending the email, i receive a response back saying that 'I was lovely and super easy to talk to. she went on a couple of dates with her housemates and wasn't sure what page she was on with him, so she didn't know if it would be an obstacle or not. Having thought about it, she couldn't go on a date with me at the same time as it wouldn't be fair to anyone' She then apologizes.

My question is/are, what does this mean exactly, and why would she agree to go on a date in the first place if she already knew that she was going on dates with her housemate?

Thank you
<bot>: Girl agrees to go on date. Gives guy email address and emails him back 5 days later to say that it wouldn't be fair since she was already going out with her housemate.