>>18124644you need to think, hard and long
you might decide that she did in fact betray you, accept that you were mistaken, toss/sell the ring and try to continue/end your existence in any fashion
you might decide that what matters is that your love was real - take the ring as a symbol that you can feel positive and happy thanks to another human being, and even if it is painful sometimes, you can try to find that love with others carrying the one in the past as a proof
you might decide that you still believe in the image she created - that she still loves and appreciates her fans, that she craves their company, feels possessive about them and that she likes spending time with them and even loves them in idealized fashion; just cause that love didn't consume her entire life doesn't make it not real, just more 'normal' - then just continue to celebrate what you have, until her graduation
the one thing you should not do is just wallowing in negativity and indecision, in constant doubt and regret
that'll just make you miserable and lead to nothing