Only if you have the want to. You could either keep it a secret (if they dont already know) or you can tell the truth.
just tell him that he broke up with her and should get over her
If no one has said it bluntly then both parties can be confused. Make sure to talk to the other person to be sure
You have to be the judge of this and it depends if you broke up with this person or they broke up with you. It's always worth a try if one or both of you feel you've made a mistake. If the other person broke up and gave reasons why they were leaving then it's best to move on.
make that other person think she`s cheating on you
You tell him the real reason you broke up with him.
If you broke up you don't have to tell him anything nor do you even have to converse with him. It would be best to let things blow over and give each other time and space since you just broke up.
Well,it depends on who broke up with who like if the boy or girl broke up with the boy or girl the person who broke up with the other person will probably right away go find someone else because it means that the person who broke up with the other person is not madly in love with their boyfriend or girlfriend but,on the other hand the person who got dumped would've probably been devastated (if they were madly in love with their girlfriend/boyfriend)and would've probably not have gone ahead to find someone else.
I don't think yall should hate each other. It depends on whether he broke up with you for the wrong reason......... I have this one guy that I broke up with and we are best friends and we tell each other everything but we broke up cause he moved.
If she broke up with u, tell her that u want another chance. If u broke up with her then tell her that it was a mistake and u want to get back together with her.
Tell him you've just broke up too.
Then you need to tell him. If he feels the same, then you're a very lucky person.
It is normal. Ask the other person out.