This is definitely a swali that cannot be answered. It's common sense, really! For one, Candace and Jeremy ARE going out. It's pretty obvious, with the whole kissing thing and they called each other 'boyfriend' and 'girlfriend.' Phineas and Isabella I must agree, I've been hoping that the oblivious Phineas would admit he likes Isabella. But, really, think- 10-year-old kids dating? No way! They're way too young!
Honestly, I think wewe could of answered this yourself.