I'm amazed by some of the replies. Honestly, it does feel like a knee-jerk reaction.
If we go to extremes like "he has no vote", then it's only fair to point out another extreme: he has no obligation to like what he sees or keep being attracted or keep acting like he is when he is not. He is also free to disagree as to the due proportion between style and comfort and, for example, look for someone who will put "looking pretty for my man" above "easy to manage", which is actually a healthy attitude (if an emotionally well adjusted man hears that e.g. his girlfriend likes him in suits, or pressed slacks and button-down shirts, he doesn't exactly go with jumpsuits from that point, either).
Chances are also that the girl is discovering herself right now, including a new side to her personality and that side is gradually taking over (i.e. the tomboy thing). Both of them are free to act as they see fit as they are not married, which includes his option to decide that he's no longer interested just as much as it to includes the girl's option to disregard his opinion.
In turn, and I am aware I am stirring a hornet's nest with this comment, if they actually were married, he would be in one unlucky place if he were expected to live with the rules that his opinion doesn't matter, well, screw opinion, but his feelings don't matter, his reactions (what's attractive to him and what's not) don't matter, being attractive to him is not important, even actually less important than just getting stuff easier to manage (stated reason). And that he's supposed to force himself into the same reactions as before (which would be lying to himself), and generally to be attentive despite himself being disregarded. I'd regret being married if that happened to me.
[quote="AllSeasons, post:8, topic:292562"]
Yea, I know. ** It's her decision, and I shouldn't tell her what to do.** But, she used to have long blonde hair, and now it's really short blonde hair, which is meh.
The other side of the same coin is that it's your decision whether you want to be with her or not, and people can't tell you to be or act attracted to something to which you are not, or to accept a certain attitude or prioritisation which you do not find acceptable. You may need to make a choice: accept where things are going or go elsewhere. Unless you somehow manage to communicate and solve the issue without either one of you becoming defeated, sinking into resignation. (Because a guilt trip is likely to force either you to act like everything's okay or her to try to look more attractive to you while resenting you for it. Results don't cut it here, what happens inside a person is important.)