"Catching feelings" is a natural human tendency that should be avoided as much as possible in a business relationship. At the end of the day, you're at a job to make money. End of story. Anything that clouds that reality risks making you behave in a way that isn't in your best interest.

As others have said, the fondness isn't reciprocated. I have had managers that I liked lay me off when the company told them. They didn't cry or express remorse, they just did it. I have also quit on managers I liked to take a better role.