✔ 最佳答案
It's the same for me... I started in a new school this year and have been here for almost 9 months... i think that my class is starting to accept me, But i have found ways to deal with it.
Anyway, back to your situation, since there are only 3 girls in your grade, you need to try to hang out with them more. Give complements; (although you may not mean it…) be nice to them. Another way would be to find the right time to tell them how you feel, that since they are best friends, you feel left out, and you want to be friends with them. Ask them if they would accept you as a friend, if that is really what you want!
I Hope this helps! Good Luck!