PLEASE don't take this the wrong way, because the spirit I am posting this I think is a positive one.
Your heart is in the right place and it sounds like you and your friend are good people.
However, it has been my experience that relationships usually go better when they start off with two people who are feeling balanced in life or are at least well on their way there.
So, what might need to happen for you at this time is to start school, get yourself feeling good about school, see a physician about your anixety, consider medication if it is recommended, consider therapy if you are not doing this already...have a plan for getting the anxiety under control and being a good student.

If you were more secure in your life and sure of yourself, it would be easier for you to present yourself to another person as a whole person and easier for the other person to feel secure in their relationship with you. Please keep in mind in no way to you have to be a perfect person, but simply one that is more balanced and with a clear vision of the coming months ahead of her.

I agree, you will meet so many other young men at school. I would concentrate at the issues you have at hand and then look to meeting other men shortly after those things are under control or at least well on their way. If your previous relationship was meant to be...at some point, it may come back into the picture.

Wishing you well.