how to get over a broken friendship, and how to make girl friends

recently someone i considered a best friend and i (14f) drifted apart. we were best friends for four-ish years. it had been happening for a while, we went to different schools and we both changed since we met. i finally unpinned her in my phone contacts which was honestly a big step for me because i still miss them a lot.

our friendship was very important to me because it felt deeper than anyone else id met in my life. i want to know if i'm alone in this, and anything i can do to not hurt as bad from missing them.

also, i’m terrible at making friends. all my friends feel so casual and not as deep as the friend i mentioned. so how do find and make good friends?

Thanks for reading 🫶🏻, i sorry if this doesn’t make much sense, i’m not that great at conveying my feelings and thoughts through writing lol.