How do I select a whole circle at once in blender without selecting other objects that are touching it? I have tried every key on my keyboard and I'm just wrecking the model. I can't find the answer anywhere.
In edit mode Hold down alt and right click on the circle.
Mouse over the circle and press "L". This selects any mesh island that the mouse is hovering over.
Of course, this will only work if your circle isn't connected to anything.