I am doing what most adults do but I don’t feel like an adult why?

I live on my own, I pay rent/bills. I prepare my own food/ meals. I drive and have my own car. I know how to get around on my own without a car if I didn’t have a care. I take care of myself physically as far as hygiene and staying fit etc but I still don’t feel mature. I feel like something still is missing. My friend on the other hand, doesn’t have her own place, she doesn’t drive. She gets around by taking Uber’s. She can takes care of herself physically ( but who can’t do that?) yet when she talks, the way she thinks, how she operates it presents her to be mature, even more mature than me. All this time I thought having things materially is what made me an adult but I’m starting to think it’s more to it.

I am doing what most adults do but I don’t feel like an adult why?
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