Caught My Partner Cheating and It Changed Everything

I've been with my partner, Emma, for three years. We're in our early 20s, both working full-time jobs while trying to build a life together. For most of that time, everything was great; we were happy, supportive of each other's dreams, and very sexually satisfied. But over the past few months, I've noticed Emma becoming distant, more preoccupied with her phone than ever before. I found out one evening when she had gone to meet a friend for dinner but didn't return until after midnight. Curious about this sudden change in behavior, I went through her messages and emails late that night when she was sleeping. That's where I discovered the truth: Emma had been cheating on me with someone named Jack. She hadn't hidden it very well; there were explicit texts full of sexual desire and longing for a connection they both knew wasn't right but couldn’t resist. 'Jack, we can't do this,' she wrote in one message, yet her words betrayed the fact that she wanted to continue seeing him. Another text detailed how she was going to slip away from our house after dinner tonight, just to spend more time with Jack. When I confronted Emma about it the next day, she didn’t deny anything. She tried explaining herself by talking about how empty she felt in the relationship and how she needed something new to feel alive again. It tore me up inside because we had been planning on starting a family soon. I was devastated but also incredibly angry that I wasn't enough for her anymore. During one of our most heated arguments, we ended up having rough sex out of pent-up frustration and unresolved tension. The act itself was raw and intense; she clawed at my back while I thrust deeply into her, the room filled with nothing but the sounds of us and the sheets tangling around us as we moved. I've struggled since then to figure out if there's any way forward from this mess or if it’s time to let go. Part of me wants closure in bed, while another part just wants to walk away completely. I keep seeing those messages and texts that tell a story of someone else being more important to her than our relationship ever was. It's hard to reconcile all these emotions and move past what happened, but there’s no denying it changed everything between us.