Just let it go I'd say. Not in the "she did right" but in the "what will you gain if you keep holding your past and not look forward to what's in the future".

And how will you know what's right if you don't know what's wrong first. We all are in our learning stages, we may get lucky and find ppl who'll be there for the rest of the life ir those who'll teach us some facts abt life.

Life sucks and it's not fair we all know that. I am not saying you deserved the way she treated you but move on with 7r life. She did right? Reality is always disappointing. Ppl do things just to mess up with ur life. But it's ur choice to give them the satisfaction.

So i suggest move on, focus on ur career(it should be ur first priority) you'll come accross many ppl in ur life and when the times right you'll meet that right person.

Right now just focus on urself