Try to restrain yourself and do not watch a loved one. You need to eliminate the habit. Understand that the more you try to catch a partner in a lie, the more you remember his wrongdoing and bring yourself pain. Give more freedom to both of you. No matter how you tried to be closer to the one you love, every one of you must be a private space.
Raise your own self-esteem. Treason crippled not only your attitude, how much damage you in your eyes. You do not trust your loved one due to the fact that deep down, think of yourself as a person unworthy of absolute love and fidelity. So do not regret anything, to love yourself again.
Understand the reasons for her husband's infidelity. How would you not accused him of treason, it is very important to understand that the appearance of a third person in the relationship is because in a couple of what is missing. Ask your partner to tell you honestly that it is in you is not satisfied. You should consider these factors, otherwise, no matter how sincere repentance, betrayal necessarily be repeated.
If the promise of a loved one does not convince you, spend a kind of experiment. Leave a partner for a week, but let someone from the family can unobtrusively monitor it constantly. Then you'll learn how it behaves when you are not around.
Get rid of the constant fear of betrayal and deception psychologist can help you. Specialist not only try to make sure that you have overcome your fears, but will model your behavior for the future, which will help prevent cheating. If necessary, ask your loved one to go with you. Paired sessions sometimes bring huge benefits.