Most of the ideas you posted seem to be aimed at your physical presence.
Although being muscular might help avoid getting bullied, it doesn't really help your state of mind I think.
Best thing would be if you were self confident and being happy with yourself.
One thing you could do is taking small challenges in several areas to improve your confidence. You could for instance say hi to strangers once a day. Maybe later this develops into having light conversation with strangers.
Another thing is making a list of things you need to do and, well, do them. One by one. And cross them from your list when they're done.
This things may not look relevant but look at them as baby steps. Each little victory will help improve your confidence. And when your confidence improves, your happiness and self-respect might improve. And when that improves, then you'll see that your environment will change for the better. People might leave you alone and others may come to appreciate your bright, sincere and happy personality.
Of course the law of attraction plays a big part here as well. Just think about being in a better place, with people treating you kindly, and you being more confident and maybe successful.
Either way, try to make yourself happy and confident, look into yourself, and don't worry about the outside world (the bullies and such). Your thoughts, the way you feel, that is what counts. The people that seem to be influencing your life in a negative way are just external factors that your mind can attract or repel like a magnet. It's up to you to reverse the polarity.
Hope that helps.