Fortress, first I'll give you the bad news but then I'll give you the good news.
First, the bad news. I'll start off by guessing that you're around 13 or 14 years old. I'm 45. Even way back during the Stone Age when I was in the 8th grade, the exact same thing was still going on. It happend back then and it will continue to happen long into the future. Back when I was in school, I was never bad at sports but, at the same time, I was never great at them either. I never did well in the sports where you had to play a pivotal cog in the team such as a basketball team or football team. Instead, I found out that I did great at those sports where it was more of an individual effort. I found solice in sports like swimming, racquetball, etc, where basically I was "doing battle" more against myself than anything else. I might not have been able to lift up a team but I could do things like improve my personal best time and things like that.
But getting back to your situation, turds like those bigger kids will always be there. Don't you EVER feel badly for the names they call you or for the fact that they're taunting you. The issue is with them, not you. Pity them instead. Feel sorry for the fact that they probably have bad home lives or, at the very least, such low self-esteem about themselves that they feel the need to bring others down. The way they acted towards you is a reflection of them, NOT you! I cannot emphasise that enough.
Now here's the challenging part. If/when they tease you from this day forward, you have to know in your heart that the problem is with them. Tell youself that daily. Engrave it in stone in your head. Know it. Their words may hurt at first but the challenge comes when you decide and act on how you're going to deal with it. You basically have two options. One is to allow it to beat you down. The other option is to make the decision to emotionally brush it off and not let those thugs hold that much power over you. People like them are garbage. Are you going to let the garbage win, or are you going to defeat them by being mentally stronger than them? This is your decision to make. YOU have that power over them.
Now for the good news: It really will get better. Back when I was in the 8th grade, I had moved to a new school in the middle of the year. It sucked both socially and grade-wise. It sort of carried over into high school. By the time I graduated, I had four die-hard friends who, to this day, are still my best friends. They're virtually my brothers and sisters. So you see? It will get better. Couple this with the fact that, if you decide to go, college will be a whole new ballgame. It was my experience that college was some of the most fun I've ever had in my life. In high school, I was the skinny kid with glasses. In college, nobody cared about that.
Alright, I've rambled on enough but it's about a topic of which I feel passionate about especially since I've "been there, done that, bought the T-shirt". Hang in there, Fort. This is a time in your life when you are going to be facing many challenges. You might not be loaded with physical muscles but now's your opportunity to develop your mental/emotional strength. Rise to the challenge! Prove it to yourselve. I know you can do it. There's no reason you can't.
Eric