I suggest moving on as soon as possible.
In addition to that^ you clearly barely know anything about her so get over it.
You've already given the reason why you should. So you know what they are.
Personally I've only really had two infatuations of any kind this past year and they were both short lived and both with people who I didn't really see myself getting together with for one reason or another. But, for me at least, the fact that I was even entertaining thoughts of another relationship was a good thing, even though nothing came from it. Taught me that if I had to, I could at least start to care for someone else.
Obviously this Diana means more to you in your head than anywhere else so my advice is to figure out why you even care so much. Figuring just that out might be useful enough.
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