I'm sure my wife is cheating =( should I expose or try to win her back?

I've have been suspecting my wife of cheating on me for the past few months. I have been consumed with trying to get into her phone and email. We stopped having sex and she always dresses up nice before going to work. I have lurked on here for a while so I understand about the gps trackers and keyloggers. She finally left her email open last week on her phone and I got the bad news =( She has been sleeping with her boss. I've read countless emails between them and there are tons of pictures that they have sent to each other. She told him in the emails that she loves me but doesn't like having sex with me. She told him everything about our sex life and about my weight. She said that everytime she has sex, she does it fast on purpose so it could end quick. From what I understand in the email, he doesn't plan on leaving his wife. This affair looks to have been going on for at least a year from what I have read. This whole ordeal has been a dagger to my heart. From what I have gathered, they have been having sex at his home and at hotels. Everything seems to be during work hours. Just writing this brings tears to my eyes. I called her on friday to taker her to lunch during her break but she said that she couldn't get off. I'm sure she probably slept with him then. Words can't explain how hurt I feel right now. I know most people should say that I should go kick this guy's butt. The problem is that this is her boss. I have met him several times in the past and he seemed to be a good guy back then. Now, I hate his guts and don't want to see him. I'm afraid that if I expose her and confront him, she may lose her job. She works as a cashier and he works in the office. If I was working myself, things may be easier but she makes all the money in the household for us. I want to get some input on how I could win her heart back. I'm thinking that if I can become more alpha, she may drop him and start to get interested in me again. It hurts to see her get up in the morning and stand in the mirror for 30 minutes. I know that she is getting ready for him. I want to lose weight and start to be a better man. Does this sound plausible? We need the money so she can't lose her job over this. I still love her and I want to make this work.

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