In ancient times, it was a defensive strategy for many countries to build high walls around the city to protect themselves from some predicted enemy attacks.
Now let's say someone keeps secluding and isolating themselves from others. (For any reason like depression, fear or any psychological disorder or personal reason like keeping away from people for a specific period of time e.g. studying for an example.)
I wonder what sentence below sounds correct to ask such a person as an advice in a metaphorical way alluding to the above-mentioned strategy in English?
- Don't build a wall around yourself.
- Don't wall around yourself.
- Don't wall up around yourself.
- Don't surround yourself with a wall.
- Don't enclose yourself with a wall.
Please bote that all these sentences are made-up metaphores based on what I need in a parent-child conversation for a short story. I would appreciate if none of my examples above work, you could let me know about the closest, current idiom / expression for this specific scenario.