She's a RN, I'm an engineer. We had a beautiful house and what I thought was a good life. I knew she had her demons but we were working through them. Then about a month and a half ago I caught her texting a guy while she thought I was asleep. Fast foreword to today, she's moved in with her step dad and he's staying with her. I feel like my whole world has crashed down. She's telling me now the whole situation is my fault for saying I'm moving out after finding out they're sleeping together. I know what to do, I just need to get this off my chest.