Mr.Z already said it, but yeah, the Ruined Princess and Evil Ex-girlfriend routes don't exist yet. That walkthrough was from a previous version of the game testing the mechanic of the routes
Specifically, the only option that changes the route is the "he wants sex" vs "he's just lonely"/not responding to that one towards the end of the picnic section, the former gets you the kidnapped route, the latter gets you the naive route. I ran a couple of variations, was able to get love between 0 and 3, which changed a few small pieces of dialogue (love mostly lowered by not responding), but as far as I can tell that's the only question that affects which route you get at the moment, since the low/negative love ones where she willingly chooses bowser over you aren't implemented yet.
Though, as mentioned, there is a bit of a split between high and low love/purity in dialogue for the different routes, which you can play with using the main menu options (just do one as 5/5 and other at -5/-5). As far as which story is which, 0 is picnic, which varies a fair bit. 1 is naive, which seems to be pretty static, since you need high love and purity to get it in the first place. And 2 is kidnapped, which has two variations (high and low purity) of the bj section. but otherwise only has a few minor dialogue changes.