I would suggest you to watch Joseph Evan’s video on adding points from YouTube. That will help you code the story properly.
First you need to choose where you will store the points gained. Readers can’t see where it’s getting stored so it doesn’t matter where you store it. Suppose you want to store Friendship points to a character whose script name is CH1 and store the other points in characters CH2 and CH3.
Then you should add: @CH1 +1 (or whatever point you want to add) to the scenes where you want readers to gain Friendship points. Similarly add @CH2 +1 or @CH3 +1 where you want the reader to gain those points.
Hope this helps! All the best for your story! 
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