I think I'm judging people I don't know
Why would you judge people you don't already know?
I'm just scared of how they might treat me.
You should avoid being judgmental towards others as it is rude and inappropriate behavior. Try to be more open minded and considerate of people, even strangers, and you will find that you will have more lasting and fulfilling relationships. It's good and emotionally rewarding to be accepting.
I see where you are coming from. Thanks for the advice; it makes a lot of sense.
That's great, and I am speaking from experience because, at one point in my life, I was just like you. I had to learn it the hard way by myself. I love that you are able to self-analyze and strive to do better.