I do not plan on saying one word to my friend concerning her dildos?
What is the reason that you do not want to bring it up?
I don't want to make her self conscious.
I think that's probably a good idea.  This sounds like personal business of hers and isn't really worth discussing.
I'm going to invite her girlfriend over and tell her boyfriend.
Not sure why you would invite her girlfriend over, however giving her some privacy is a good idea. Do not think she necessarily wants to have an in depth conversation concerning dildos anyway.