There are too many negative thinkers and mean people in the world to become one of them yourself. You can't help how people treat you, and I learned this the hard way when I was in high school.
One day, as I was in the car with my mom driving home from school, I was contemplating why I was being treated so poorly by some of the girls in my grade. I was never anything but nice and respectful to these people, but they still didn't treat me the way I treated them and I was so confused. Even if I was super nice to them, they would still give me a hard time about my "fangirl" phase I was going through.
At the time, I was head-over-heels for celebrities such as Selena Gomez, Justin Bieber, and Taylor Swift. I wasn't doing anything to hurt anybody else and while I can understand how I may have come off as "annoying," I still was treating everyone around me with respect.
I don't regret how I handled the situation those two years of high school. I stuck up for myself in the ways I knew how, and even though I would never let anyone treat me now the way that they did then, I still stand by my morals of being a kind person. I was being bullied, but I never became a bully myself. It doesn't matter how I was being treated, it just matters how I handled it.
In life, you have little to no control over how someone acts toward you.
However, you have full control over your actions and how you use them.
Don't take the way other people treat you personally, especially if you aren't doing anything wrong toward them. Keep being good to people and treating strangers and friends alike, well.
Ironically, Selena Gomez sang it best with her song 'Kill 'Em With Kindness.'
You are an amazing person and have so much potential in your life. Anyone who attempts to make you feel differently is only struggling with themselves. As I told my sister once as I was recently dealing with a bad friend; "If someone is saying something mean to you, just know that they are saying something ten times more mean to themselves."
Happy people don't feel any need to treat other people poorly.