is it normal to think about breaking up with your boyfriend even when all is good?

I've been with my boyfriend for about a good year now and everything is going well. He treats me right, is loyal and tries to spend time with me when he can. But I just feel like we have no spark, or deep connection still. When I wanna get deep, it seems he just doesn't care enough. and I feel like the relationship is mostly sex. We have sex almost every time we see each other. Loyal is no question about a relationship but no communication is a problem, which he lacks of. I always have thoughts of us breaking up lately. Like the possibility of us not being together in the end. He talks about wanting to "marry" me even though we are so young and freshman in college. But he doesn't even know my favorite color, or flower, or candy. But when we're together it's always good. We never fight, always laugh.. so like.. I'm in a dilemma here. Advice?