I homeschool and I go to a teachers house with some of my friends. One thing she taught us was about how we should only hang out with people who make you feel valued. She showed this with plastic water bottles. If you buy a water bottle at a supermarket, it's not going to cost much. But if you go to a theme park, and you run out of water, your'e going to be willing to pay more without realizing it, and at an airport, where your'e not allowed to bring water from home, you will pay a lot for a water bottle. The water was the same quality and size, but depending on where it was bought, it was valued as more because of how much you wanted it. Same goes with your friendship circles. You should make friends with people who value you the most, where your opinion is valued. If you think that your new friend isn't worth it, don't try to make her be your friend. I would suggest talking about it with her or hanging out with only your friend after school or on the weekend.
I hope this helped you out.