Hmm, if you have to change your hair is he really worth it? Is he gonna stop caring about you the minute your brown roots show?
I'm sure he doesn't hate brunettes; some guys prefer blondes but I can;t think of many who just straight out hate a hair colour. Anyways; If that is the case he needs to get over himself and I can;t picture him worth liking.
Meanwhile if you mean he has a preference for blondes (and that in itself doesn't mean he only dates blondes), that's just how it goes sometimes, it's a good thing there's so many fish in the sea =]
Don't change yourself for someone else. I learned that the hard way. You'll just end up regretting it. I have no preference when it comes to hair color, but all the girls I've liked have had some shade of brown hair.
no def don't change your hair color that's dumb because if he likes yhou he's going to like you for you and not because of your hair color. Here's a good one for you my uncle prefers blondes but he's dating a brunette now and they have great chemistry so I wouldn't worry about it just take it slow and see where it takes you I'm sure its not a big deal to him. If you're wanting to change your color just get a couple of highlites and not because of the guy but because you want to.