Change.

I notice that little change in tone when you speak.
It isn't much but the way the i love you's don't come up to your tongue anymore.
The way that you almost never show upto my door;
unless i call and ask you to.
and suddenly i feel like I'm eleven and don't know what I'm supposed to do.
and then I'll feel like this is where we start to fall apart.
this is where you'll slowly start to break my heart
and this is where I'll start wanting to run.
this is where I'll want to tell you that we're done.
not because i don't love you anymore or that subtle shift in your tone.
it's just that if I'm scared, I'll break your heart to protect my own.