If you believe that your relationship has a perspective, try as sincerely as possible to talk with your partner about monogamy and jealousy. Share how you perceive your meetings with other men and how you feel about dating your partner with other women. Perhaps you decide to conclude a monogamous union. Otherwise, try to come to some agreement, adopt certain rules - for example, such:
1. Perceive sex and flirt with other people without emotional involvement and agree in advance on the admissibility of such events in each specific case.
2. To enter into sexual relations only with unfamiliar to you both people, or outside your city, or with people to whom you do not experience love.
3. Each of the partners has the right to one "free" night per week.
4. Do not discuss the details of "extra" sex or completely hide what is happening from a partner. Be sure to agree on how you will perceive the news about a real or imaginary connection if there is an accidental "leakage of information".
5. If you intend to commit something that goes beyond your usual behavior, inform the partner in advance.
6. Always take care of maintaining honesty and trust.
Translation by A. Gerasimov "The Way to the Heart of a Man"