The first thing that came to my mind (form what I understand it is) was "Our Relationship Is..." It takes time and they are friends from the beginning and it take a lot to him to like her...
If that is the vibe...
Also have
-Lovely complex (but the triangle isn't really one)
-Crazy for you
I realized now...
U mean that the ML isn't the guy she like for a long time
- Positively yours (the friend gets a bit possessive but I wouldn't call love)
thnx love ヾ(☆▽☆)
In the last one she is already friends with the guy they have crush initially
Also Akuma de Sourou is a bit that vibe you asked for. But she doesn't end being friends with the ex crush just but also not hating (as some manga/etc do)
Pls suggest some Mangas or manhwas where one pines for the piner. Wht i mean is say mc is in unrequited love since forever but has no hopessince they are bffs and then ml comes and gets interested. Won't mind if the piner gets to be with his crush or the new guy I just want some angst, and yearning. Pls suggest some. I won't mind if both are in unrequited love with somebody else and then meet each other and become friends to reach other. Tht also is fine