Most Helpful Guy
He cheated on you, date the guy you want, he has no right to be upset about it because of what he did in the past.
Most Helpful Girl
It's only a bad idea if they are super close, however you have to look out for yourself and your own happiness too! I would date him if that meant I'd be happy, but also if you have to see your ex all the time that may be a problem. Do whatever you want and don't settle for less x