u/Open_Rope_9522

I am devastated that I have to find out by accident on my own , found her not at work as she was saying but somewhere else in the car with another man .Not sure what happened between them but she swear that it is only a friend.I have challenged her saying that if it was a friend why the lies, secrets , hiding etc.. still no response.
The way I feel is bad , I do not sleep at night , walking like a zombie , now it has affected also my work performance and already been called in for my superficiality at work where I almost made a company loss of various millions of pounds.
Please help do not what to do.