You can tell her that you are very beautiful now, and I like you very much, and tell her the sequelae that plastic surgery will bring in the future.

For example, you can hug her and say that you are beautiful like this and there is no need to change. Or you can hug her waist and say that you need to care more about your body than your face. You look embarrassed. Take this romantic route, let her revel in the sweetness of your flowers, until she thinks of your tenderness when she thinks of plastic surgery, so she won't go for plastic surgery.

This disguise also gave her a sense of security. What's more, you can say that I like your natural appearance and especially hate plastic surgery. You can give some examples of plastic surgery failure to make her realize the harm of plastic surgery. Sometimes she feels that others are cured. You can still tell her that it is only temporary, which is different from natural aging. The former is a dummy, and the latter is really beautiful.