Isabella Garcia-Shapiro has a huge crush on her neighbor and best friend Phineas Flynn. She has romantic daydreams about him and hopes to marry him one day. She never tells him directly, though. Phine...
Isabella Garcia-Shapiro has a huge crush on her neighbor and best friend Phineas Flynn. She has romantic daydreams about him and hopes to marry him one day. She never tells him directly, though. Phineas's feelings for Isabella, on the other hand, are relatively unknown, varying from platonic to romantic. Isabella has a huge crush on Phineas. It is currently unknown how, why, or when she fell in love with Phineas. She uses her position as Fireside Girls troop leader to stay near him and assist with his Big Ideas, under the guise of earning the "Help Thy Neighbor" patch among other more specific patches. Although she usually just speaks to him as a friend, she occasionally attempts to flirt with him and cutely greets him with the phrase "Whatcha doin'?" almost every time they first see each other each day ("Isabella and the Temple of Sap", "The Fast and the Phineas", "The Beak", "Phineas and Ferb: Summer Belongs to You!", "Canderemy").
Phineas' feelings for Isabella initially were somewhat unclear, but towards the end of the show's runtime, it is shown that Phineas actually harbored romantic feelings for her. At a young age, Phineas often seemed oblivious to Isabella's feelings. However, he often showed signs that he liked her as more than a friend, much like she does for him. He sees love from a formulaic point of view, trying to recreate it like one of his projects and not truly understanding what it means. Whenever she hints at her crush to him, he either misinterprets the comment as platonic or gets confused. Either way he never gives Isabella what she wants: to spend quality time alone with him. One example is when Isabella invites him to the "Night of the Falling Stars Girl's Choice Dance" as her date, Phineas brings Ferb to the event as well, possibly assuming she meant all three of them would go together as friends ("That Sinking Feeling", "Out to Launch", "The Fast and the Phineas", "Run Away Runway", "Comet Kermillian", "Candace's Big Day", "Canderemy"). It's possible the reason why Phineas doesn't pay attention to Isabella's interest in him is because he is too busy with his Big Ideas.