Me and my friend are both bi and we flirt is it serious

me and my friend flirt I lay in her lap she lays in mine we have slow danced together but we have never talked about dating but our other friend who is not bi but is a girl says it is ocward to be around us alone does it seem serious

Being ignored for any reason by two other people in the room is always awkward. I suspect your flirty friend could provide you with a much better answer to that question than any of us here. Why not ask HER if this is serious?