I wouldn't say I have a crush on my characters, but there are some I like far more than others. Overtime I've learned that the ones I dislike, I generally need to develop more to see if they have any redeeming qualities at all (ie is a crazy sociopath a kind cinnamon roll? or can he be? and why).
There are definitely some that I feel parental to, some end up being a surprise - I don't realize how much I like them until I have to write the actual thing of something bad happening to them and have to deal with them crying in the moment. I have to tell myself, it'll be okay, it'll be okay, even if I haven't thought of the solution that makes that true yet QAQ