How would you even know if your ex boyfriend is on the rebound? Take 4 Minute Quiz And Find Out Your Chances! . I would say that if he moved on to a new relationship within three months after his breakup with you then. The common wisdom here says he's in a “rebound relationship ” – and it's common Take The Quiz: Can You Get Your Ex Back Or Is He Gone Forever?. So take the rebound relationship quiz to answer the question: Is your rebound relationship a match made B. He is a bit like your ex but only the good qualities.