Will people stop bullying me if I lose weight?

Probably not. They will probably find some other reason. Nonetheless, if you feel like you'd like to lose some weight, go for it, but first think for a minute if you want to lose weight for them or for yourself. It's a big difference. Don't do anything for the bullies, because they don't deserve it. If you do decide to change your weight, I would suggest going to the doctor and asking for opinion on your health. They are a professional. They will tell you precisely if your body is in a proper shape. Also, remember, that society is being judged by impossible standards of Barbie dolls. Maybe you simply represent a different type of body, maybe your hips or arms are simply wider? All the more reasons to go to the doctor to ask for a professionals opinion. I wish you good luck on your way.