what decision should I make with my relationship with a girl

Sure, why not? If you revolve your life around what others say, you won't have a life at all. Enjoy yourself and don't let others dictate your life ;-)

Why did the two of you break up? Have you changed? Has she changed?

I'd love to say "of course you should go back out with her! Who cares what everyone thinks!" But I remember 10th grade. And I know you (and she) do care about what other people think. Unless you are very mature for your age. High school is filled with stuff like this. It is where you want to be original, just like everyone else. The tear between being an individual and being part of a group.

This is totally up to you. Perhaps you can show everyone she's just as great as you know she is. Perhaps you won't be able to take it and you will end up hurting her. This is something you have to decide based on how much you like her, and what kind of friends you have. If you have a group of friends who will accept her and support you, I'd say go for it. If you're friends are "cliky" I would seriously think about the decision you are making. You don't want to end up hurting her.

I definitely agree with Bella Dea. It all depends on your strength and how much you really care about their voice.

If you'd be uncomfortable being with her, and if you'd become upset or depressed about being with her, then don't drag her into something that could be hurtful.

But if you know she's wonderful, and if you're willing to push everyone else out of the picture if they try to mess things up, and to give the cold shoulder a few times (harder than it sounds ), go for it.

For me personally, I didn't care about what anyone thought about the people I dated... but that was easier for me to do, because none of them were in the same classes as my friends and I, and the most significant one did not go to my school.