Yeah, I read women don't mind baldness unless you make a big deal out of it. I forget what counts as making a big deal, keeping your thin hair instead of just shaving it, or if shaving it counts as making a big deal out of it, or if asking her which she prefers counts. I guess it just depends on which you do and whether she wants to use that excuse.
It is true that a woman might not dump you for going bald. She could dump you for not having 6-pack abs. Sure, you never had six pack abs, and that never seemed to bother her, but that was when you had hair. So she is not dumping you for the recent loss of hair, but the old fact of no abs.
Unless no hair would disqualify you no matter what your other features are, she is right in saying the hair is not the reason. It is actually the total attractiveness that is the reason. Just this fraction is almost out of your control.
Even if she marries you, she can divorce you, or she can gain weight because she knows you won't leave her, or she can be incharge and spend the money because she knows you won't leave her, or she can have a head ache every time you want sex.
My advice to you is to just start working out 30 minutes a day if you are not already, and just start improving yourself. You don't have to do it fast. If you meat her standards now while you are balding, that probably means she can't get a guy like you but with hair anyway, so you should not be self conscious about that. Just add attraction to your body at the same rate you loose attraction on your head. Maybe get better a little faster if you had more hair when you met her or she got better since then.
Other than that, use the drugs necessary to maintain.
If you hide your head in the sand and think all will be well later when you lose your head, read the paragraph two paragraphs back again.
Do you think that any girlfriends tell their boyfriends (or vice versa) that they would leave them if something out of their control happend to them? I doubt anyone is that unromantic, when they are with someone they are attracted to. I'm sure 95% reassure their partner they have unconditional love, and many nieve people on this site quote that as proof that their ex girlfriend loved them. But we know that in most cases it does not happen, and most where the partner stays, she is no longer pretty herself.
Taugenichts said that since balding is gradual, women are more likely to stay. I think since it is gradual, it is easier for them to forget what he used to look like. The attraction will fade, and she will get offers from better looking guys if she is still pretty. It will come down to attachment, commitment that was not just for commitment in return, and extreme rare compatibility, or she will be one of the 90% that leaves. She [women in general] may stay if he only drops a little, but the odds raise a lot if the drop is big. It is her youth here that she is giving up so her bald boyfriend can enjoy his.
The moral of this story is to not hide your head in the sand or confuse love with romance or villafy people rather than accept the truth. Know what can happen, and do what you can to look your best so that she enjoys the relationship as much as you do.