Smiles and Non Frowns

Don't be fooled by my lack of a smile.
I'm only like that every once in a while.
'Cause when I'm around you, in our place,
Sometimes a smile creeps unexpectedly to my face.

If I were you, I'd take this as found:
That if I'm sad, I'll wear a frown.
If I'm happy, which is my usual state,
My mouth may not say it, but inside, I'm great.

I guess when I smile, I'm really, really glad,
So when I'm not grinning, please don't feel bad!
Part of it is, I don't want to be fake,
And have a smiled believed when it's make.

Be it years of trying to hide my heart,
Or something in my brain keeping soul and mouth apart,
I want you to know that you fill me with such joy,
And that I'm glad to always be your boy.