Hello Monty

this is a delightful poem of love that lives on. It expresses your strong feelings of love to the one lady that ruled your heart and continues to do so.
What a wonderful thought!
"Know in my heart you’ll remain
Bound with a chain you can’t sever,"

Your comparison of love with a prison and chains that bind forever change the negative into the positive. That's a novel thought.
"You’re a prisoner of love,
And you hold the lock on my heart,"

Heartfelt feelings come through impressively. Word choices, figures and style come together in the most agreeable manner.

Imagery-
Imagery is visual and appeals to my mind and heart. The picture of a lover reliving a glorious past and an assuredly great future come before my eyes.

It flows well.

Write on!