OP I am sorry people are not listening to you here before going off on their theories about marriage.
I heard how much this public declaration of commitment to you means for you, and I heard your sense of rejection, feeling unloved and unvalued, and your crushing hurt.
How are you now, and what are you feeling? What are you going to do?
This tbh is a edge of the cliff moment. IF you back down from your stated need (for him to publicly declare his love and commitment to you), the power balance in your relationship will shift hugely in his favour. This will be a big sign to im that his needs are always the ones that count, and that you don't have to be listened to.*
This is why you are so devastated. This is a big test, let us know what happens.
I really do hope you don't roll over and back down from something that is IMPORTANT TO YOU. YOUR NEEDS MATTER. I hope you calmly announce that you feel devastated and could he moved out for a few weeks to give you some thinking space. If he refuses, then perhaps YOU can move out, go on a holiday all by yourself for a week, see how he does juggling work/kids/housework. Or you could shun him. Act as though he doesn't exist for a week, from eye contact to washing to cooking to conversation to sex.
We make a huge mistake when we continue to provide ourselves and our services as though they are part of the air that everyone breathes.
*These dynamics are important and happen whether married or not.