If many people know about his infidelity and don't care whether you know it or not, you must talk to him calmly and ask him if he still needs this home. If he says he still wants this home, you must make him promise not to cheat in the future (although it may not be completely guaranteed not to cheat in the future, it will definitely converge a lot); If he has no sincerity to continue to maintain this family with you, you should be prepared to divorce him.
If you love her very much and don't want a divorce, you can also talk to his good friends or relatives (but don't make a fuss). If it works, that's good. If not, you have to put up with the fact that he cheated on you. As long as he is ok with you, you should move him with your heart and let him know that you love her the most in the world! You must not do things that disgust him, but do things that make him happy, just like not knowing that he is cheating ... but if he is too crazy, you can ask him if it is glorious for you to cheat. Do you want me to die? I don't really want to die, it's to scare him.
You can cry secretly and pretend not to let him know (it is necessary to laugh when you see him) ... As long as he is willing to live with you, he will gradually find that he has a very good wife and will gradually get rid of the problem of cheating in the future. If you have enough patience and love, he may get better in the future.