Caught in My Web of Deceit

I'm a 54-year-old man who's engaged to the most wonderful woman. We've been together for three years and are planning our wedding. But last week, I found myself trapped by my own lies. You see, two years ago, while still single, I met this stunning 26-year-old at a local café. She was enchanting; we talked about everything from classic literature to astronomy. We started seeing each other in secret because she had issues with commitment, and honestly, so did I at that time. However, it wasn't long before my fiancée and I found our feet together, yet the flame of passion still smoldered within me. So for months after starting a relationship with her, I continued to meet this younger woman occasionally, under the pretense of business meetings or errands. We were both careful and had no intentions of hurting anyone until last week when we got too close, one thing led to another, and it happened again, sexually. It was exhilarating but deeply wrong. She confessed she's been with a few married men before me, making our affair more of a routine for her. I've since ended everything with her and told my fiancée the truth, which broke her heart but earned us both a chance at real honesty now. Yet every time I close my eyes, it replays in graphic detail, the soft whispers and intimate touches that shouldn't exist anymore.