I don’t understand why people start a relationship if they don’t want to be with this person. Precisely to be, and not just to be under the same roof. If they don't want to be faithful, be honest, be caring and loving. Why start a relationship if you want to sleep with others, if you want freedom, for which you have to lie? Live freely and be happy. Or is your happiness based on someone else's pain? Contact a psychologist then, or something ... Some people do not know how to be honest and faithful in a relationship. It is better to live freely than to hurt another person.