How can I stop developing feelings for someone?

I'm developing "feelings" for someone, and I'm trying hard to stop this. But I can't. I cannot deter these love-like emotions.This person isn't a bad person at all, in fact I've never met someone I click with in a long time. We are very alike, but there are some differences - tolerable at most. I just don't want to get hurt, or sabatoge anything. I'm an Aquarius.