When you and your friend are both in the "OK" camp, it can work if they date your ex, or you theirs.
When you and your friend are both in the "off-limits" camp, it's great -- it simply doesn't happen, because you both agree it's not a good move.
You know them well; slowly you can start renewing contact with your ex and see how it works. Leave your ex for some time Being with other person will give your ex a new experience and may be it will help him sort out his/her feelings. You need to protect yourself and stay away, this way your ex may realize that they have lost you..Even when you think you’re completely over your feelings, you’re not always ready to see them happily having feelings for someone new.And that can make us all act just a little bit kooky — at least for a little while.But when your mind starts wondering whether or not it’s a rebound, you can drive yourself crazy analyzing their behavior and obsessing over every little detail about their new relationship.In this article, I’ll lay out some signs that will help you understand the rebound behavior and figure out on your own whether or not they’ve moved on. The longer they’ve been in the new relationship, the less likely it is to be a rebound.