...and this is the basis to reward her with exclusivity? Beauty is common. You can find another good looking woman who isn't as fvcked up as this one. You'll have to give a better reason to reward her with a LTR status.
People come on here looking for answers. You can bytch and moan about how crappy your GF is anywhere. You get answers, but you continue to justify why this woman is worth your time, energy, and devotion regardless of how terrible she is. When she's 55 years old, she's no longer going to be sexy, unless you enjoy saggy tits, stretch marks, a droopy ass, and a vagina you can stir soup in. You'll be left with all her defects that no longer measure up to the definition of "sexy". When she's going through menopause, she won't be "charming" while she's getting hot flashes and growing facial hair.
The problem with women today is people like you who reward bottom-of-the-barrel garbage. Women won't get better if men like you don't raise your standards and demand a good woman for exclusivity.