Most Helpful Guy
As you must know, it's impossible to say at this remove. There are some guys that will want to reunite and others that don't ever want to get back together.
The most important thing is that you consider what ended the relationship the first time, and consider if that issue has been resolved or if it would recur.
Most Helpful Girl
It's possible to have an ex as a friend
but typically they are being friends only to grease the rails for easy money or potential friends with benefits - not saying that's your deal
When competition seems likely the other guys will step up their game to win you.