Hi and welcome to the forums. Can I ask why you want your alters to talk to your friends?
I don't have that issue of wanting alters to talk to friends (not surprising, I don't have friends!) but my alters come out and talk to whomever they want to when they need to anyway. Those are the alters who take care of world type interactions anyway. But most of alters are trauma alters and only deal with that kind of stuff, and I wouldn't want them coming out with friends at all.
Maybe check with your alters though. I would guess that any alters that had any interest in interacting with others would have gone ahead and done that all your life anyway!
Just editing to add that it really might not be a good idea for littles and trauma alters to come out with friends. Friends aren't trained in trauma and dissociation issues and could cause a lot more harm than good. DID is painful stuff. Be careful.