Hello, Blue Moon 878,
I remember a movie I once saw with Paul Newman as the star who was befriended by a lady who fell in love with him. She told him that she loved him, and he looked at her rather quietly and said, "do you need the words?" She responded, "Yes, very much, and if you ever say them I'll never let you take them back." That struck a chord with me for some reason, and I never forgot it.
Maybe some men are like that; the words don't mean as much to them as the behavior does. That really is the truth in some ways. Behavior speaks far more loudly about who and what one is than words. If he's kind to you, attentive, and caring, that's part of love, if the behavior is genuine.
It could be that.
Hope you find that he can be honest with his feelings and let you know how it is with him, too.