Whether you like someone or not is ultimately something you decide for yourself.
What I’m trying to say is this:
No matter what you do for someone, or what they do for you, unless you decide that you like them, you won’t actually fall for them.
For example, even if you call each other privately over and over again, if you don’t feel anything special, then “liking” them doesn’t happen.
But if you tell yourself, “The fact that I want to call them this much must mean I like them,” then that feeling of liking starts to take shape.
Most of the time, people do this kind of thing unconsciously, so they don’t really notice it.
But if you consciously decide early on whether you like someone or not, it’s easier to get closer to them — and easier for love to actually happen.