Trust me when i tell you this, THE BEST REVENGE IS MOVING ON.
I was dumb and i thought revenge was going to do any good, but you know what? It only showed how affected, hurt & weak i was, and for your ex partner thats what they love to see, you weak & down.
Go no contact dont ever show up to her in social networks, messages, irl, nothing. Desappear off the map for her and she'll wonder where you are, when the other guy dumps her she will want you and realise what she lost.
Stay Strong, no contact is just hard at the beggining.