Don’t drop out just because you don’t think you’ve been pushed outside your comfort zone enough.
At the end of the day - you’re still living on your own. My parents both still live within 20 minutes of their own, and have never left their hometown, but they’ve both done alright for themselves. Yes, it’s good to have some independence, but there’s no need to move to the other side of the world or anything just so your parents can’t help you.
Personally I decided to just stay at home during uni and commute, and I’m now finishing my 4th year. I was worried initially I’d made the wrong decision, but I now don’t regret it even slightly.
I’ve had all the same opportunities to make friends besides of course flatmates, but to be honest the vast majority of my friends are barely even in touch with their first year flatmates at this point, so that’s irrelevant really. Plus with covid half my friends went back home over most of my first and my entire second year anyway, so with that factored in, I’m 100% confident I made the right call for me. Of course - everyone is different though.
At the end of the day, whether you move away for uni, or when you’re 30, or even never at all, is entirely up to you - there’s nothing really to be gained in having ‘full independence’ at 18 rather than say 21, and so I really wouldn’t worry about it. It’s certainly not a reason to drop out, in my opinion.