My best friend is fading

Ok so I have a best friend named d and her 2 other best friends that go to another schools nams is c and s. D and s moms are bestfriends so they have known eachother since they were little. D and c went to school together when they were little. I have no problem with c, but the thing is that im jelous. She has 3 best friends and I have 1. And sometimes it feels like I have no one beside her to tell my problems to. Sometimes I cant go out without her cause im not that close to anyone but her, so it would b weird if I went out with my other friends and not her...u know? Me and c are becoming closer with eahcohter, but d is getting mad about it and doesnt want us to become closer. I keep telling d that if she wants me to not be friends with c I wont be. Wowowowowo anyways I want a way to become closer with d, and be closer to her more that c and s..so how do I do that. how do I become closer with my other friends who I really love but arent my best friends...please help
-l

well let your bff know that just because you have other friends, and get to know other people better, doesn't mean that you'll forget her and your history. Explain that there are levels of friendship, and she's definitely on the highest tier. Try making a weekly movie night just you guys where you can hang out and eat oreos and just have fun being bffs, but also let her know she isn't the only person in your life.