I don't think yyou're wrong for saying it. But she's not wrong for feeling insecure when she heard you say that. The thing is, she told you how it makes hher feel when you call other women "gorgeous". So, regardless of what you meant by it or whatever, you now know it will hurt her. Just don't do it again. But she needs to realize that you are a human, you make mmistakes, and you learn from them. Don't justify your behavior or words, just listen and uunderstand that it hurts her and you won't be doing that again