Why does doing the right thing feel so bad afterward?

I’m travelling and staying in a hostel. I met a woman there and things escalated quickly into kissing and making out. In the moment it felt exciting and validating — it was my first real make-out experience she put my hands on her boobs

As the night went on, she became increasingly drunk and started talking a lot about babies, pregnancy, and wanting another child. She said she wanted me to get her pregnant and asked if I wanted kids. That made me uncomfortable, and internally I felt a shift from excitement to concern. Even though the physical stuff was still happening, it didn’t actually feel good anymore.

I decided not to sleep with her and instead focused on getting her back to her room safely with her friend, making sure she had water and was okay. Her friend later told me I was a “gentleman,” which I appreciated, but emotionally I still felt very unsettled afterward.

The next day I felt a mix of emotions: anger, sadness, feeling used, rejected, and strangely ashamed or “dirty,” even though I know logically I did the responsible thing. Part of me hoped that when I saw her again things might feel balanced or mutual, but she kept her distance, which made the feelings worse. I also started questioning whether she was honest about being divorced and whether I was misled. Her and the friend said hello and bye to me but it felt awkward around her

I’m now struggling to process:
• Why I feel so upset and angry even though nothing “bad” technically happened
• Why the validation felt good in the moment but turned into disgust afterward
• Why I wanted reconnection even though I know it wouldn’t have been healthy
• How to deal with regret about not stopping earlier when I already felt uneasy
• What this says about my boundaries, values, and need for intimacy rather than casual sex

I’m not looking to blame her or myself — I’m trying to understand why this affected me so deeply and how to process the emotional fallout so I can move forward in a healthier way.
Why does doing the right thing feel so bad afterward?
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