The easiest way to get Dyson's friendship route is to play like you're trying to romance him, but say you prefer monogamous relationships.
The trick to Paz's is not getting too many points with him before/during the drinking game. There's more than one way to do this, but the easiest would be: 1) Stay put so he's the guy you meet first, 2) Say you prefer non-monogamy, 3) Don't text any of the guys back, 4) Text your friends when you can't sleep, 5) Drink a soda.
I hope that helps!