Does anyone forget that they’re not a teenager anymore?

Sometimes when I see teenagers posting on subreddits for making friends / chatting and stuff, I would type out a request, then before hitting send I realise I’m already years out of the age range and it’s creepy, so I delete everything I just typed :/

The fact that it happened so many times makes me think if I’m too immature for my age, which is why I still feel like a teenager and want to talk to people of my mental age (?) Am I just a teen stuck in an adult’s body lol