I'm turning 23 and I feel old, is it normal? anyone else felt the same?

I'm wondering if it is just some natural feeling to feel old once you start turning 23 (associated with the beginning of the 25 years old crisis) or if there may be other reasons behind it.

I'm thinking that me mostly being surrounded by 18-20 years old people (because I started my studies over), who just recently graduated high school also has a lot to do with me feeling this way.

But overall it isn't a good feeling, I feel like I have missed most of my young and carefree years (which I only spent studying and struggling) and that this led me to nowhere and that now I'm just an old girl who has never had any kind of relationship, doesn't have anymore friends and who is unable to bond with people around me because I feel much older than they are.

It sort of kills any hope I had had about the "future" regarding social life.

Is this normal?
I'm turning 23 and I feel old, is it normal? anyone else felt the same?
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