Just a little clue (A hint from me to you)

These walls I've built up...
Well, they're not that so strong.
They can be torn down with time, but no one hangs on that long.
But I can understand why no one wants to stay.
It must be hard having a friend so withdrawn, who seems to push away.

These walls I've built up...
In all honesty, they're not even that tall.
Specifically built that way, in case you climbed, wouldn't want you hurt from a fall.
Oh and if you have tried to climb, next time take the stairs.
They're just around the back, I put them there in case somebody cares

And these walls I've built up...
The ones that aren't so strong or tall
They're kinda pointless, they barely block out the pain at all.
And although I'm strong, i don't have enough strength to take them out myself.
I'll admit something I never have before, I may need a little help.