Friendship 😥😞

Warning: long story :(

I want to know what friends mean to you?

Ever since i started highschool ive had the 3 same friends and now its been 4 years and i just feel like theyre closer to each other than to me. Im the only one who plays sports at school so half of my time is already consumed by practice and whatnot. I got a boyfriend a year and a half ago and ever since then i balance out sports, relationship, friendship and school. But no matter how hard i try its like they're purposely drifting away. They hang out without me, dont even ask me if i want to go with them. I see the 3 of them post stories on snap and pictures on insta together with captions like "forever♡" or "my girls" and i didnt even know there was a get-together. Last time i got into a little beef with 2 guys older than me (friends with 2 of my friends) they didnt even defend me while the guys were insulting me. So i just stopped talkin to them. And my third friend just stopped talking to me. Its like the in between stage of being strangers and friends and i just dont know what to do. 😢