My husband is sleeping with my best friend

Kindly advise this lady on what to do next;

Dear Admin,

My name is Susan and I am married with one child. Lately, I discovered that my husband is cheating on me with my best friend. He rarely comes home and when he comes, I notice a smell of another woman besides finding lipstick on his shirts. From reliable sources, I understand he is sleeping with one of my best friends who she met at a dinner we hosted at our house. Last night, he came home way past midnight and was very drunk only for him to demand we get intimate with me which I denied him. I have not seen him for weeks, nor do I know where he sleeps, he does not pick my calls, he doesn’t reply to my text messages, nothing. I tried asking about his whereabouts when he showed up but he became very angry and slapped me, a matter that made me very annoyed, depressed and wanted to commit suicide. I have never been hit before by a man in my life hence this was so degrading and I am considering reporting this to the police. However, I still love my husband very much and don’t want him to have trouble with the law and also; I don’t want our child to be affected by all this drama. I have been having headaches all day when I think of this and I want to commit suicide so that he feels the pain of losing a wife. What should I do with him? Please help me, please.

Susan