The term "unsaid" refers what is not explicitly stated, what is hidden and/or implied in the speech of an individual or a group of people.
The unsaid may be the product of intimidation; of a mulling over of thought; or of bafflement in the face of the inexpressible.
I still love you, but I can't say it
I don't know the right words, or the right time
I want to change my life, before I face you again
And tell you everything, that's in my heart and mind
You changed my life, when you came into it
You made me happy, and hopeful, and brave
You were the one, who...