Take a short break. For example, for 3-4 weeks. Tear off all contacts with his ex-wife. Do not communicate with her even by phone. During this time, try to change for the better. Get active, start to attend additional courses or find a new job. Not be amiss to update your wardrobe and change the haircut. The former spouse should see you in a new way.
Start to analyze all the mistakes you made during your communication. Surely the wife told you why she was leaving. If the problem is in you then try to change. For example, if the ex-wife accused you of inertia and laziness, become more active person. Of course, to change themselves in a short period of time quite difficult, so to achieve the result you can go to a psychologist.
If the spouse left because of feelings for another man, become better than he is. Try to prove to her that you are more than worthy candidate. For once, she was your other half, so you were attractive to her. Try again to generate interest among spouses.
When communicating with a former spouse don't start fights and scandals. You need to communicate quietly. Even if she provokes you to the conflict, get away from him. Move the conversation to another topic.
Make the former spouse a pleasant surprise. This can be a bouquet of flowers, a nice gift or just a well-spent evening. Solve her little problem and don't ask for anything. Move your relationship in a different direction. Prove her that you have no complaints, and you're ready to communicate with her as a friend. After a month relaxing, can talk to her about your relationship. As often as possible create a situation that will remind her of the pleasant moments spent with you. Because in your life there was a lot of good. And if the woman will be on this regularly to remember that soon she will want to return to the relationship.
Give her a holiday
Prove her that you love her. For this you need to regularly tell her about his feelings, to compromise, and in any case not to quarrel with her. As they say, the water wears away the stone not by force and frequency of impact. And your job is to be always there to constantly prove your feelings and wait for the ex-wife back.