I think this lady is being very mature, she has identified that having come out of one relationship, and given her study needs as well - shes not ready to start another relationship.
She has been very honest and up front and for that reason alone i think you need to respect her wishes.
You can not make her want you and if you try to you will just push her even further away.................. and then you might lose her friendship and if you consider its a possiblity the chance to change her mind when she has finsihed studying and has got over her past relationship.
thats a big risk on your part, to wait to see if you can change her mind and not what i think anyone would recommend, but it is of course entirely up to you !!!
if you dont want to risk it then you have to get your head round walking away, which im sure you cant imagine doing but as per the others, you will have to ......
good luck !!