Section off myself Put a wall up/What the **** have I done Keep the dog at bay Survive by saving me! Values and the game Not a ****-up - Not a part of your lie I am one, I am all - I'm above and beyond!
To section off is to cut off, or cut up into smaller areas. For example, police will often "section off" a crime scene to make sure no-one enters.
If you "section off" yourself, it is a poetic/metaphorical way of saying that you are cutting yourself off from someone/something. I think that's what you suggested it meant, so you are correct.