I'm making a game thats highly in tune with being able to interact with much of what you see. Just think GTA and your set, except still not quite as in tune. So I know I want relationships in my game but i'm unsure of how to do it.. love , friendships, and people you hate. I'm using a drop ship decision making system with the options Paragon / Renegade for different outcomes.

If you're willing to use EUDs like you seemed to in the other thread, you may as well use keyboard detection for an 'action' button and selecting options. If your game is multiplayer, then some other EUD thing that is shared.