No, sorry but I don't know how you feel.
I remember being 20 years old and a guy I knew ... started spending all his time with another woman - and yes that hurt.
However, I did not think she was inherently pretter, or more than I was. I just thought wanted her more than me. I think you will find that everyone has issues .. you just don't always see them.
My advice for you is ... give yourself one more week to moon over him and then .. SNAP OUT THE H*** OUT OF IT. It's non-productive.
Build up yourself .. put that wasted energy into yourself so that you can be your best both inside and out.
That way ... this time next year you can be ready to meet another guy that's 10 times better than that guy and .. he thinks YOU are it!!!
Invest in yourself!