If you learned that the guy who was pleasant to you has a girl or the groom started an affair on the party, do not hurry to hand over positions. It is possible to try to take control of his thoughts, to make friends with the competitor and to learn her weaknesses, and then to discredit in the opinion of the young man.
If you liked the young man or the man, but it has a girl, think of expediency of fight against such competitor. It is quite possible that it is worth finding the free person. But there are also such situations when arises a love triangle and your husband / beloved actively other girl attracts. It is possible to give up and to cry quietly aside, or to find adequate methods of fight against the competitor.
As they say, all is fair in love and war. For a start make friends with the competitor. But she should not know about your artful plans. Position yourself in such a way that you do not suspect about treason. If it is the girlfriend of the guy who was pleasant to you, behave easy and do not show that he to you is nice.
Pay more attention to own appearance. Otherwise the man can be fond of someone of another until you spend all the time for fight by the competitor.
Weaknesses of each other are known only to close girlfriends. You should learn its age, social and marital status, some traits of character. Usually share all secrets with close girlfriends. Then unostentatiously hint the man that his darling behaves somehow ridiculously or strange looks in this new dress. Be not afraid to admit any venomous remark to the competitor as men very much listen to others opinion. But do not go too far, otherwise your beloved can suspect something. Deride better a similar manner to be painted and put on on some other example.
By the way, similar strategy can have back opposite effect. Having seen as your ideal "absorbs" each negative judgment of the girl and does not object, you can just be disappointed in it. There is also other option of elimination of the competitor, more humane in relation to it. Having become the girlfriend of this girl, communicate with her more often and talk about a subject of your adoration. Try to convince her that this man just it is not worthy. Extol its external data. At some party pay attention that "that nice guy obviously became interested in it". It is possible to go further. If it is not the mistress of your spouse, and just the girlfriend of the guy who was pleasant to you, find to him replacement.
Try to acquaint the competitor with other man. It is quite possible that then you will be able to arrange the private life.
Try to spend more time with an object of love and its passion. Be interested in hobbies of the young man more. Let it know that he very much interests you. It is possible that the man will like your interest and care. It can help if the competitor a little scornfully treats the beloved and does not appreciate him. By the way, some girls wish to resort also to services of fortunetellers and fortune-tellers to charm darling. But it is not recommended to do it categorically. At each magic ritual the opposite action is shown sooner or later. And the probability that you will give money to the ordinary charlatan is high.