Most Helpful Guy
As soon as you're over the ex, which there's no minimum time required. You'll hurt yourself and your new person if you're dating when you have feelings for the ex.
I just started seeing a girl who I have a ton in common with and we had an amazing date but she just revealed to me last week that she just recently got out of a 5 year relationship so that makes me cautious. At least she hasn't complained about him or anything.