I had the same problem with my husband when I started wearing my hair boy-short. I loved it! He did not. He said...well, I'm not gonna tell you what he said. But he better be glad he said it with a laugh!
Look, I so get it that after a while we get tired of trying to do something with our hair. I'm a wash and go kind of girl as far as my hair goes. I'm the one wearing my hair and having to deal with it...not him. So he finally said, "well, if it makes you happy, I'm happy." All I can say is that he didn't hate it enough to kick me out of bed! LOL! And on a sad note, he passed away this past January. So I'd love to hear him b---- about my hair again! But when he realized that THIS was how I wanted to wear my hair, he got over it and still loved me. He didn't just love me for my hair anyways. Your husband will come around I bet. You can't be the long-haired girl he used to date anymore and he shouldn't expect you to not ever change. Hasn't he changed over the years? Does he still even HAVE hair? LOL! Just kiddin'. I'm sure the two of you can come to a happy compromise.