Most Helpful Guy
Distracting yourself with someone new helps some. Just make surely they know what it is. There is nothing worse than falling for a girl who still has feelings for someone else and finding out after several months that you are just a rebound guy that she is sleeping with every night. Hobbies and other things will help too. Try to challenge yourself to meet some new goal like getting a Masters Degree or being able to run two miles in 13 minutes. Mainly the biggest thing that will help is time. That being said you should remove everything that has to do with your ex from your life. Remove them from social media. Get rid of or pack up any photos. Stop going places that they go. That way it won't hurt when you find out they are seeing someone else. Better to not know.
Most Helpful Girl
I prefer to have a break and let myself heal. I let myself be happy while being single and once I'm content without anyone, then I'll start dating again.