I was always called naive and this made me question myself,my personality and my perception of reality

I'm 20M and people (friends, family..)still call me naive to this day and this made me feel bad and insecure,that I'm easily tricked, stupid and hurt by others and this is making me an easy target to any danger,i never understand that and always tried to watch my behavior so i can understand their point but i ended up being called bad and obsessive by them(the people who called me naive),i feel i didn't grow since the age of 14 and that my developing stopped there,i tried to talk to people online seeking advice but it didn't went well because i was so sad and ruined and my logic to even understand that i have responsibility towards being happy was gone, sometimes i feel i just wanna isolate and not knowing anyone in my life and just live by myself which is something impossible and not healthy

please if anyone managed to understand what i mean to give me some advice because i feel i couldn't explain it properly

ty