Is Autism a personality disorder or mental illness? And whats the difference between a personality disorder and mental illness?

Personality disorders are a group of mental illnesses. They involve long-term patterns of thoughts and behaviours that are unhealthy and inflexible.

Autism is not a mental health problem. It's a developmental condition that affects how you see the world and how you interact with other people.

Explanation:

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d

well say a good goal is to do 150 sit ups in a week! or 90 pull ups a day. even 60 push ups in a month these are all fair goals!