I find it difficult to advance 20 meters.

Hey Reddit, I’m a 20-year-old guy and my ex is 19. We were together for five years as high school sweethearts, and I genuinely thought we would end up getting married—maybe that sounds silly given our age. For some background, I relocated for work and while we tried to make long-distance work, I discovered she was chatting with a coworker. Unfortunately, it progressed beyond just talking. After some back and forth, I made the decision to cut off communication. I truly wanted to resolve things, but she admitted she was confused and uncertain about stopping her conversations with him. I’ve also said my goodbyes to her family and let them know we’ve parted ways. Now, nearly two months have passed, and I feel stuck. I constantly question my worth; I’ve cried, hit the gym, and tried new hobbies, yet I can’t shake her from my mind. I’m not keen on dating anyone new right now—I just want to figure things out on my own. What’s particularly painful is knowing she’s still in contact with him, which makes me feel even more worthless. If anyone has advice or insights, I’d really appreciate it. Thank you.