I think in order to fully grasp the actual length and deepness of Hans's feelings for Henry, one really needs to read the book that inspires Hans to confess because he relates to the characters. Hans is very secretive as to what really goes on in his mind in the game but you will have every answers once you read what character he aligns himself with.
Think Hans would grow resentful of Henry if they run away together? Well...
"So Arthur put his proposal to Galehaut, who replied that he had subordinated his own interests to the king's for the love of Lancelot, "and now, if you take him from me, you will be taking my life. I cannot live without him." Galehaut said to Arthur, "I would rather be poor and happy than rich and miserable!"
Think Hans wouldn't understand if Henry wanted to aim for another goal in life?
"Galehaut spoke quietly to Lancelot. "My dear friend," he said, with a deep sigh, "the time has come when I must lose you."
"What shall I do when the king asks you to join the Round Table? You are all the world to me, and you know that I am yours, in heart and soul."
"You are the worthiest man I have ever seen or known, and my love is wholly yours. Why would I want to join King Arthur's household?"
"But if the queen asked...?"
"I would refuse her if I could."
"We both know that would be impossible."
And just some more snippets that makes me want to gnaw a chair because this man that never knew actual love FOUND THIS CHARACTER TO TRANSLATE HIS FEELINGS FOR HENRY.
"Without his brilliant young companion, he felt that the very foundation of his existence would crack and fall apart."
"Galehaut persisted. "Don't be concerned about that, my friend. I would rather be killed by him than remain alive without him."
( @heartofskalitz and I are both weeping and I thank her for sharing her adventures reading the book and us realizing just HOW DOWN BAD Hans is for Henry )