He used to be fine with the fact that he's not an expressive person
it's often hard for him to find the right words to say
he is fond of keeping things to himself
but right now,
the things he would do just to be able to let his sense of expression rise from the bottom of a dark abyss.

His mind is yearning for him to convey his bottled-up frustration of thoughts.

"He needs to tell her how much he loves her  
how much he appreciates her  
how much she means to him
how blessed he is to have her
how beautiful she makes his life
he needs to tell her all these things, but how."

She will never  know.