I've always found it super nasty when they had like double or triple eyelids that looks so horrible but now I herd you can do it without surgery, would you do it can I recommend it to my gurlfriend what is better?
This is what I saw YouTube.com/watch? v=7myHS2rZMcg
Surgery should be done for the sole purpose of his/her desire alone- let alone if needed (e.g. damage from accident, sickness). Let your girlfriend decide for herself. It looks like you're encouraging her by even reccomending her this process or another. You should love her, regardless.
Do you have mono eyelids? You should not pick at such a small aspect of her like that, telling her that will only hurt her. In some regions like Asia double eyelids are seen as the slandered of beauty. Girls will have surgery to get them or use special tap to give them the appearance of double eyelids.