Needing vs wanting someone?

So my fiancé said something to me that got me thinking. We where watching a show on tv about a couple and the guy said “I don’t need to be with you, I am fine on my own, but I want to be with you.” My fiancé said yeah wow that’s how a relationship should be, you should never need anyone.

I feel like this kinda worried me because I feel like I do need and rely on him. We are getting married, we are getting a house. I couldn’t do that on my own, if I was single I would share rent on an apartment with a girlfriend or something. I moving, that’s something I never thought I would do and it’s because of him. Suddenly I am aware that I rely on him and it makes me sad that he doesn’t feel the same way. I’m wrong for this right? I feel like maybe I am confused about how a relationship is suppose to be and maybe I need to rely on myself a little more?