To say I love you? And how long did it take your spouse?

I’ve been with my boyfriend for only a month. But since the beginning the energy has been different. I just knew from the minute I met him that this will probably be my last relationship. I’d never been so content with another person .. Anyways we talk about moving in and kids sometime next year. He swears he knows that he wants to be with me forever so why doesn’t he “love” me yet