I've never run with the crowd - they wouldn't have me, but I'm not a rebel either. There is a road you can walk where you don't feel you have to fit in, where you don't have to justify your existence, where the opinions of others are just that, opinions.
This is a powerful road, because it leaves you truly free. Bullies can't bully you because they can't take away anything tat is important to you. Trolls are simply entertaining, because they can't hurt you. No matter what they say, their words have no weight, so you are free from them.
Since you are not working so hard to conform, to be popular, you can focus on just being you. not the best you, you can be, but just the you that you are, which is all you need to be.
You are 19, just starting out in life. I'm 51. I've got a good start (took me a while) and now I'm up and running living a life i could not imagine as a teenager. And inside I'm still 18. I still do the same stupid stuff I did as a kid, and I don't care who sees me and judges me.
I still look at life and laugh. I'm still amazed by the people I meet and the places i visit.
You have all of this and more ahead of you. Enjoy the journey, and if you get to be 51 and are still filled with life the you'll know you took the right path.