I'm looking for a manga where the female lead is a very nice but not dumb, rather smart female lead, who isn't really interested in love.

Like she doesn't even care much about friends.

I hope the manga is not dark tho. Like nothing Tragedy or depressing. Rather it would be better if it is comedy.

Oh and it has to be a romance genre.
Would there actually be a manga like this? 🤔
I'm excited to see if there are any. 🤩

Minsanthrope no Kanojo

I haven't really read much of this one but:
Kare Kano

One of my all time favourites:
Koi dano ai dano

It sounds like you are searching for a school life thing but if not then Princess (It is a Manhwa though)

I'm pretty sure there was a lot of these in the 90's and early 2000's Skip beat! and Boys Over Flowers come to mind. Also search anything made by clamp.

Beauty Pop comes to mind and the classic Ouran High School Host Club. Idk can be argued that she's more on the stupid side, but Abide in the Wind might fit. Also more on the drama side. Here are some more that I think might fit as well:
I'm a Martial Art Villainess, but I'm the Strongest!
Akatsuki no Yona
The Princess Imprints the Traitor

Also this search result: smart female lead kind female lead

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I'm in idol hell T.T

Kare Kano is one of the all-time great manga series. I would recommend it to anyone.

-- but the female lead isn't nice at all. That's why I love her so much. She's always scheming and looking down on other people. She has a hilarious narration style where she insults all the other characters.

Of course, there's character development over the course of the series, but it's still a bad recommendation for this thread.

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"We can not resort to simplistic or extreme solutions which substitute myths for common sense." ― Jimmy Carter