I am looking for a manga that the male lead has a crush on our female lead to the point that he doesn't know what to do around her...it's like the opposite of most of any typical shoujo manga I've read so far...also if the female lead knows about it and she teases him around...it would be totally hilarious...but is there such a manga out there...I wonder...any suggestion would be really awesome...thanks in advance. 🤣

Like Prunus Girl? It's a mystery whether it's a she or a he.

B gata H kei. Kind of.

Like Kawaii Oresama or Stroke Material ? <--Smut

I also recall:

Boku to Kanojo no XXX
Ai wo Utau Yori Ore ni Oborero!

Here the "teasing" is due to clueless girls inexperienced in love, but both are quite intelligent:

Last Game <--Guaranteed
Koi dano Ai dano

Not sure about:

Lingerie
Ashita no Ousama

Edit. You can also take a look in the following categories, but since there are lots of H, use advanced search. Just a bunch of these popped out of my mind.

Reverse Gender Roles
Role Play
Role Reversal
Female Dominance
Strong Female Lead
Independent Female Lead
Smart Female Lead
Male Lead Falling in Love First
Emotionally Strong Female Lead
Tsundere Male Lead
Weak Male Lead
Character Who Teases the One They Love

Or in the most general cases:

Shoujo with Male Lead
Shounen with Female Lead

I insist, you'll have to carefully type your search because as there are very good ones hidden, also are quite bad. Just one label at a time, don't overuse them, else you'll find nothing. And lots of patience....

Wow...this is so awesome...thank you so much you guys.... 😲 😁

Spice & Wolf (Novel) or you could just watch the anime (too bad it only covers a portion of the novels)
Yakushiji Ryouko no Kaiki Jikenbo although it's untranslated there is anime called Ryoko's Case File. The guy doesn't have a crush on the female lead. In fact it's the female lead who has a crush on the male lead, but it doesn't prevent her from teasing him (a lot).
Tasogare Otome x Amnesia
Edit: Nazo no Kanojo X maybe...

zippy ziggy though she can also be violent