What the hell is this?
How messed up must your circle of friends be that you feel the need to declare that you are comfy with the gender you are assigned? I'm not being funny here, but if you have a mate in your circle of friends who is a bit confused with things, that's easily dealt with, isn't it? "Ah, that's JimBobSarahSusan, (s)he's a bit confused" and that's that. Same thing with two people, "ah, that's JimBobSarahSusan and LucyBillMikeElaine, they're a bit of an odd pair but it works for them and they're happy so good luck to them".
Even three or four, you can simply say that they're a different bunch but that's all there is to it.
I must beg the question, to what extent must your circle of friends be confused for you to feel the need to stand up and declare yourself cisgender? I can imagine a circle of people all introducing themselves and suddenly someone gets fed up with all the confused people and just blurts out that he / she's cisgender.
Seriously.
Wat.