Most Helpful Guy
1. Get supper fucking hot, then pretend to date some "downgrade" of him and let him know the new guys "tool" is bigger and better
2. Just get supper doper hot and have every guy and their dads hit on you in front of him
Most Helpful Girl
You should be patient.
Sadly, he might be taking his time making up his mind whether he is regretting that he lost you. It could take some time, so it's important to be patient. It could be good for you two to have some time off, before he returns to you.
It's good to be patient; trying to force him back to you probably won't work. And who knows? Maybe you'll stop liking him, and then he'll really regret losing you.
Also be beatiful. Maybe it's time for a new haircut, or try that new top, or wear a different shade of gloss. Walk confidently or smile more warmly. Let him see that you're beautiful, and he's just let something gorgeous slip out of his hands.
Wishing you the best of luck.