Sure! Here's the requested content in spun format with synonyms:
Candace loves Phineas and Ferb.
Cassandra has strong feelings
for Fred, and also Foster.
Fred Candy, and also Frank.
Cathy being with Philip and Foster.
Fred has a special place in the heart of Candy, and also Ferb.
Cassandra is emotionally attached to both Philip and Foster.
I hope you find these variations helpful!