Could you guys recommend me some drama's in which the girl falls in love with her enemy? Thank you ^.^

Maybe King2Hearts or The Bridal Mask is what you are looking for, at least kind of. Something close in politics- City Hall, All about my romance and not so popular, but in my opinion still worth it-Myung Wol the Spy. Some other: Emergency couple, Princess Man, Sword and flower, Athena. My last recommendation is Secret, this is a bit hard melo, so prepare yourself ;) Let me know if something here is what you are looking for.
Gu Family Book - male lead fell in love to the daughter of the man that killed his father

Empress Ki - female lead plans to get revenge to the emperor by making him fall for her

pinocchio - male lead falls for the daughter of the woman who destroyed his family