I don't think there's a perfect solution to the last name thing, but I have to say that this: "If I hyphenate, people will see myself separately from them," - is not anything I've ever heard. And it's crazy - does it mean he isn't really committed to you if he doesn't take your name?
I changed my name because I didn't think I cared about it, but to be honest if I was doing it over again I might not have. Many women I know kept their names and the world kept turning, schools figure it out, etc. Hyphenating wasn't an option - our names were just too long and didn't sound . I did keep my maiden name as a second middle, but it doesn't appear on anything in full except my checks and social security card. There's really no perfect solution (we have friends who invented a whole new name for themselves, but my husband wouldn't go for that - and I'm not sure I'd like that either.)