I think I might be bi?

They're your feelings and its your choice how you feel, regardless of anyone else's choices. But remember, coming out as bi is kinda a big thing and it's not something you just f*ck around with. This is how people will see you, so make sure your okay with that, and your true to your feelings. If they're really your friends they will understand and not critisize you for "copying" them, becuase thats ridiculous. They should be cool with it.