Is 25 still young? when does “youth” end?

I have lived a life of abuse, regret, mental health issues and self punishment, I never even tried to snap out of it until I was 23, I am roughly 25 and a half, I feel like I’m not young anymore, I hate myself for the choices o made and the things that i allowed to happen to myself, and the people I pushed away, I wasted every opportunity ever put infront of me, I would like to think I still have time being young to look forward to but I don’t know
Is 25 still young? when does “youth” end?
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