i would say this f**k THEM, never quit, let them quit, and open you mouth and realy breath in them and cough all the time so they can smell you all the time.
You can tell them that you have more clean teeth that they have.
So do not be crushed by them, be brave, love yourself, some people are really mean and they think they are perfect.
If i get reactions i just open my mouth and really breath thru my mouth and they do not pick on me. Try to breath thru mouth all the time, they know you have bb so why to hide it.
Let them suffer if they suffer so much, but i do not think it can be such a problem. You have to show people that you accept and love yourself even if you have bb.