For your castle is my prison

The reason you smile is the reason I cry
And what brings you joy only brings wrath for me
When you look at your loved one with stars in your eyes,
All that hits my heart is a flaming, accelerating meteor.
I'm threatened by your happiness and that is unhealthy.
But how do I escape when your hand is holding my heart?
Your castle is my hell.
And I want out, but I know you can tell
That i'm not even trying to escape.
But for the record,
Your castle remains my hell.