How do you make an enemy a friend on avatar university?

For a friend, just have them talk a lot. While customizing, make them have the same interests. It'll make it easier.

For an enemy, say someone is dating (lets say Leesha and Jamal), and that stupid little Pilar is always trying to make them break up because (lets say Ivy) was to take Jamal away from Leesha. Then, Ivy was told to fall in love with Rock, Jamal's brother. Now Leesha and Jamal hates Ivy.