Girls, My girlfriend asked me if a girl was prettier than her, I honestly said yes. She got upset... Opinions? Can you read details?

For me it's normal to find someone attractive, but it doesn't mean I'm attracted to that person. I'm in love with my girlfriend and she's really pretty, I tried to make her see my point of view and she couldn't understand.

For her she has to be most pretty girl for me. But I would be lying, I don't mind if she finds a guy more pretty than me because there is, as long as she loves me I don't care! I'm trying to get her point of view, and I think she's really low self-esteem, and has some trust issues.

But I really try to considerate her and show to her that I love her and that she can trust me... But with this it got worse, and she's really hurt.
Girls, My girlfriend asked me if a girl was prettier than her, I honestly said yes. She got upset... Opinions? Can you read details?
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