<human>: Can you provide a brief overview of the text?

My girlfriend and I have been together for a long time. She came back from a long business trip to another state and confessed that she slept with another guy for a couple weeks.

I had been busy with work and kind of distant, and she had been wondering if I would ever be ready for marriage. She didn't know I was making plans to propose. This other guy told her everything she wanted to hear, made her feel wanted again, and she went along with it.

I never thought she was capable of it. Trust was such a big part of our relationship. I *knew* that this was impossible for us, but I was wrong. What's especially painful is that we talked several times while she was on this trip and she lied to my face. She even told me that we needed to talk when she got home (meaning that she had decided to confess) but kept sleeping with him in the meantime.

She's saying all the right things now. She says that it's the worst mistake of her life, that she doesn't know how she forgot how good our relationship i, that she just lost touch with her real life on this trip and now she's snapped back to reality and it will never ever happen again. She seems sincere. I believe her, despite everything. But I'm just so hurt. It just doesn't feel like this can really be my life. I know, abstractly, that people can work past this kind of thing, but I don't know how, and I don't really know if I should.
<bot>: My girlfriend cheated on me. She confessed and wants to work through it, but it was just such an enormous breach of trust. Do people really heal? Should they?