You were very afraid of this (and maybe you didn’t expect it at all), and here it happened - he cheated on you. And nothing, if it was once, but you learned that he has a constant lover. After hours of hysteria and longing, you realized that you still can not do without this person and want to return him. How to do it?
Talk to him
Men, in principle, are not too eager to leave the family or a serious relationship over which they have long worked. They are logical to insanity, and do not like when all their efforts go down the drain. The appearance of the mistress, in most situations, is caused only by a thirst for intrigue and new sensations. The matter may not even be in you, he just had the opportunity to escape from the routine, and he took advantage of it.
You can offer him a try all over again, and it is likely that he will agree. However, immediately put the question in such a way that you do not tolerate a repeated misstep.
Give him a break
In the event that you have a conflict, you should not act on a hot hand. If he is annoyed, then any attempt to establish relations will cause only irritation. Let him rest, calm down and miss you. And after some time, act in accordance with the first paragraph. If you are dear to him, the likelihood that he will agree is rather high.
Behave as you were before marriage
If the first two points did not work, then the cause is deeper than it initially seemed. Probably, you have changed yourself, and not for the better, and that is what pushed your loved one away. Think about what you would be before marriage, and what you are now, and first of all analyze your attitude towards him. Maybe that's the whole point?