Here are some examples:
* Jeremy: Candice's most frequent crush. While he doesn't have romantic feelings for her, he does sometimes get flustered by her attempts to get his attention.
* The "Guy in the Red Shirt": A boy who Candice briefly develops a crush on in one episode, but this interest never develops further.
* The "Boy with the Green Hair": Another crush of Candice's, though this is also a short-lived one.
Overall, while Candace has various crushes on different boys, she doesn't have a steady boyfriend or a main love interest in the show. The focus of the show is on the adventures of Phineas and Ferb, not on Candace's romantic life.