[Twinge]

I like the imaginary sequence and would not change what the poem represents.

Tonight I dance with depression,
Until sadness clasps my hand,

That word bugs me a lot here - it sticks out in the way it sounds. It pierces the flow as I read it at least. You need a smoother sounding verb to replace it with.

The last line also... I don't understand what you are trying to point out or signify by saying depression will never last. How will it not? You're encountering it during this poem more than once. Unless you have a different definition for "to last" in this poem, which I'd definitely respect, replace it with a more smoother phrase that expresses reality. Maybe "will last no longer", some phrase of the sort. You get my point, I hope.

I don't see how using "it" is a problem. When you use "it" - either repulse or fear is accented, and very well at that. Depression is definitely an "it", and the writer is desiring to distance herself from what she sees as a monster. This sparks additional conflict and helps us feel what she is feeling. Intimacy and distance collide within emotion, that part I like.