I don't love my girlfriend I love the idea of having a girlfriend
What exactly do you think having a girlfriend is really like?
It is the same thing as having a daughter in law except she will cater to your needs and not talk back.
It is not good to have an idolize version of what a person should be, it would be better to make the relationship better by working on it. Otherwise she would just break up with you.
I don't want to work on it. I need a woman who is not going to challenge me.
If you are feeling upset by your relationship situation then it is nice that you are willing to talk it out. Just know that it is pretty unreasonable to want a woman who will never challenge you. You are basically looking for a human with no opinion ever.