Open cheat window:Ctrl+Shift+C
Enable :Testing Cheats True (Needs it to work)
(NO SPACE)
First cheat:Need:Sims name typ it in find the second sim you want typ that in.Pick a number between 1to100 because that's the green bar
Modifyrelationship (Your sims name) (Other Sim) 80 Friendship_Main
To make enimes typ in the same thing but minus -90
Modifyrelationship (Your sims name) (Other Sim) -90 Friendship_Main
If you want to make more then friends ;)
Modifyrelationship (Your sims name) (Other Sim) 100 Romance_Main