I am not trying to pay an entire 2/3 of the rent.
What about your girlfriend? Is there something you want to tell her?
I will let her know when I do not want to pay rent anymore. She makes enough money to pay for the missing two-thirds.
It is good to ask someone to pay their fair share of the rent. You should expect a 50/50 split if you make about the same amount of money.
I'm going to be picky with who I want to live with next. Since she makes more money, she must pay all the rent.
Well her paying all the rent is not very fair. It is without a doubt fair for you both to pay half of the rent instead of splitting it unequally.