Perhaps you are thinking of one of these characters:
* Fiyero: He is Elphaba's love interest and a prince of the kingdom. He is initially engaged to Glinda but ultimately chooses Elphaba.
* Dr. Dillamond: He is Elphaba's professor and a mentor to her. While not a romantic partner, he is a supportive figure in her life.
Please clarify your question if you are thinking of a different character.