There's a slight chance it could go away. It's still pretty early in the game for you. But as in most cases, if it is still there when you're 18, it's there to stay.
If you get made fun of, look at who's making fun of you. I developed gynecomastia in sixth grade and went through the depths of hell in high school without ever being teased. The only time I remotely got teased was when a girl that liked me called me some name. Even then, I don't know if it was teasing about that. If these are friends making fun, tell them that they need to quit. If it is others that aren't friends, avoid them at all costs. If it is family, start emotionally distancing yourself from them now. Trust me, there have been parents that tease their own children with this condition.
You'll survive. Even if it doesn't go away, surgery is the other option. A good surgery where ever with whoever you want is attainable, it just takes some time. Most guys get through this on their own anyways, so you've got pretty good chances. Think of yourself as lucky, this is something that is going to teach you a lot about yourself. I believe any guy who has had this condition grows from it in some way.