Hmm.. . IDK. Maybe you can try SWEET GUY? (●'◡'●)ﾉ
This definitely fits your description:
http://www.mangago.zone/read-manga/3d_kanojo/
Well, I wouldn't call the girl "popular", but she's sort of seen as pretty cool and mature.
Horimiya is a very good read!
^How did I not think of Horimiya? It's exactly what you've described, and the story is amazing
Thank you :-) I know and really love horimyia so will read the other two because I don't know them thank you :-) :-) :-) :-)
Hello :-) would you recommend me shoujo manga where the girl is cool and popular very active type, while the guy is nurd or bookworm or smart but kind of outsider.
I don't know if something like that exists but I'd be happy to read it if it does :-)
Thank you :-) this place is the best :-)