Everyone has had a first kiss and first girlfriend, and it's awkward as hell. My wife has this delusion that since I was decently buff when she met me, I was a ladies man. Wrong. I was a shrimp band nerd that was shy and had anxiety about girls. I took this hot chic to her prom, at a different school. I didn't know anyone, nervous as hell, didn't know how to act since I was square and didn't party. Plus I couldn't dance. She hung out with her friends more and pretty much left me hanging. I was so pissed I couldn't see straight for days. Apparently chic was easy cause a buddy hit it later on.
My point is most teenagers are ass holes to other kids. I got picked on and did my share of picking on kids that had it worse. It's life. Just know it will get better. Try not to let it shape your self worth, which is easy to say now. Being 38 now, I see things much different. Unfortunately you have to go through **** to gain life experience and change your perspective.
Maybe it helped I became an EMT at 16 and volunteered for about 12 years, I don't know. I know if you pour yourself into something and give selflessly to other people, you can let go of your own self loathing. You don't have time for pity parties.
Now my step daughter has a 5 year old that just finished kindergarten. Going to be a small kid. He's been in karate for about a year now, and his first month or 2 in school, some bigger kids were messing with him. I told her to leave him in karate, because one day, he may have to whip someone's ass to get them to leave him alone. Verbal stuff I don't worry about, but they were physically pushing him around. I told her to prepare for a call from the school some day, and she said she will be okay if she does, because he will have given them 2 warnings.
Keep your head up, don't go off the deep end, and control what you can control. That's your actions and your attitude. Happiness is a choice. Don't put stock in negative stuff kids say about you.
Get your mind right, hang with people who like you. Hell I even dropped friends that didn't like my wife when we were dating. Long time friends, wanted me to dump her. I met some people that had healthy relationshios, and we decided to work on ours. We've been married 10 years, and some people havent see since.