I'm cofused...

Please help me... I'll provide a little information b4 i ask my question. June I started talking to her again I was not aware she had a MU so I thought it would be okay to try smth again with her. Fast forward to june 29 we had a date where when she went to the comfort room I scrolled through her phone and discovered she had an MU, it hurt me a lil because she was hiding smth from me when I felt like I was the only one (fast forward again). July 1, 2026 I let her choose between me or that person she said she chose me. So I went home and drifted to sleep with the satisfaction im the only person she wants and I dont have to share her with anyone (fast forward), 2 days ago that guy confronted me about the situation they're in. And I found out she had been 2 timing me with the guy and she chose the both of us without us knowing, cause she said she chose me and she told the guy she chose him. We eventually broke up with her 2 days ago and we agreed to not talk to her again, but I still secretly talked to her because um stupid when it comes to love... but I still love her so much. I'm confused wether I should run back to the hands I was held in, if I should go back to the warm hands that sheltered me from the cruel world. Because she said she's willing to change as long as I wait for her to change, but i'm unsure if I could ever trust her again.

(Please help me out 🙏)

(Sorry if my grammar or punctuations are wrong or bad)