how to get with best friend? the hint says chill in the dorm but it don't do anything.
There are 2 routes for the best friend, Romance and Milkshake.
For the Romance route you must talk with them in their room about sex 2-4 times (depends on your gender combination), then take a shower during weekday mornings before classes until an event plays where your clothes are stolen, then enter your room between 7pm and midnight to have them ask you for help with homework.
For the Milkshake route you must max out your Party stat at the quad party by either drinking milkshakes (only female mc) or passing the dance checks and you'll get the option to invetigate what's on the milkshakes. follow the path with them to get blackmailed and then you'll get the option to talk about your experience.