In that case, the first thing you can do is that move on in your life as she moved on. If she moved on then give value to her decision. A girl should have free will to make a relationship with someone that she wants. Forcing a girl for a relationship does not help anyway.
Secondly, If you believe that was a misunderstanding and you were in a relationship with her already before and you think that somewhere she does has some feelings for you then you can cast a love spell.
Moreover, you can do a free love spell that works fastis already given on my site. If you still think you need help feel free to contact WhatsApp: +92322-66907-23.