WhIle I can understand where you guys are coming from, there are literally no games that exist where your characters can have ANY sort of relationship in multiplayer. Heck most games just assume one player is the hero and ignore the existence of the other players. It's kind of jarring when you're playing with friends and you aren't allowed to have your characters interact. Ever.
That's why I'm hopeful that the rivalry/friendship AND romance system is for single player and multiplayer. Just because it would be more fun for people like me who do play co-op exlusively. I mean, my options for playing co op rpgs with my boyfriend that aren't just hack and slash games...Uh...The old infinity engine games...NWN...NWN2...And that's it.
I would be fine with set companions that people playing multiplayer can't acess or something. BUT I would be at the very least disappointed if the relationship system was SP only. (And remember guys BG2 did have co op. It was very bare bones co op but it still existed. >.>)
Don't worry. They have already showcased that in multiplayer you can interact in-game. You have always a few choices what to say/do and in SP the NPC character will pick one depending on your actions etc. so I think that it was build for multiplayer but that tool will be superbly used in singleplayer. At least I hope it will be like that in end.
