It doesn’t feel good to be jealous, and jealousy isn’t societally seen to be good either. But is it really as bad as its reputation? The “green-eyed monster” can in fact be a warning sign of relationship problems, and if you learn to read the sign, you can even strengthen your relationship. “In this respect, the mild variety of jealousy definitely has a positive side,” says psychotherapist Wolfgang Krüger. Let’s say a woman goes to a party with her partner and converses animatedly with another man – perhaps even flirts with him. Her partner takes notice and feels a rush of jealousy. “Jealousy …