"I promise"

How am I supposed to feel?

What do I say
  when my heart gets tied in a knot?

My heart beats so fast
  and then it sinks to my stomach
I can feel the sparkle in my smile
  slowly dissipate
The words that form
  when I open my mouth
Do they have any meaning,
  or am I lying?

No, I'm not lying, I'm just
  trying to move forward
Support goes a long way
  even when you have no strength
Being thankful for the moments
  we even get to speak
Those moments
  are everything to me

I'll keep my heart closed
  I promise
I'll smile
  because you're smiling
I'll be okay
  so long as you're okay