Help me :-(

Do me and my boyfriend are approaching our year anniversary and I feel as if he doesn't love me as much as I love him. We say I love you to each other but the other day we were talking about how serious we are and he said he thought we were pretty serious and I agree... But then I asked "do you love me to the point where you would do anything for me" and he said "I don't know" and to me that means a no... That's not the only thing though that makes me think this. I am wayyyy more affectionate towards him. Also he doesn't talk to me as much in public almost like he's embarrassed of me. This makes me sad I don't know what to do. What is your opinion on this situation and if you can offer me any advice please help!!!