I need help. :c

Hey ladies please don't be mean.
How can I get some sort of backbone and mind of my own?? I don't know what's wrong with me, but I've always been the mousy type that doesn't know how to say no to people. I never say what I want because I feel like I'll sound stupid, and I don't even know if I have an actual opinion??? Is that possible? I feel like I just agree or go along with what other people want from me or of me. My husband isn't a mean person, but If my husband says he doesn't like a certain hair color, I just don't do it. I don't dress the way I want because he doesn't like it. I never express myself and I feel like I don't know who I am anymore. Anyone else in this kind of situation? I've never been confident or one of those strong girls with amazing self esteem. 😭😭😭 Recently because of all of this, I've just been so unhappy and depressed... 😭 I want to change this please help me!! Advice, anything.... :c