I want to try to strongly dissuade my GF from doing a Ph.D. Can you resonate with me?
Are you upset because she is going to have a higher degree? I can't understand the truth in this matter with you.
I have the same degree, she has nothing to do with my degree. It's just that I am feeling bad about her decision.
Even though you might not like it, you shouldn't discourage your girlfriend from getting her degree. She has a life apart from you and should make decisions about her career on her own.
I am not trying to stop her decision, I'm just saying that it is not a good idea to go with a Ph.D.
She wants the degree so she should be able to get one. Whatever you say to her about it won't change her mind. Let her get it and choose her own path in life to the fullest.