Boundaries

If you create them, 

And they are not respected,

Then they can't be your friend. 

Friendship is about boundaries,

And respect.

If you didn't have boundaries to begin with,

Like when you were young,

Then it was a free-for-all for everyone else.

Of course they'd want to be your friend,

Because they had no boundaries to respect. 

But once you start creating them, 

And that becomes a problem for others,

Then maybe they just weren't a true friend to begin with.