i love the last line; it says so much without saying it at all, if that makes any sense.

It starts out rhyming, but then stops half way thru, which gives it kind of an uneven, halting feel toward the end. It would be fine if you didn't rhyme anywhere or it you rhymed throughout, but as it is, it sounds like a mistake. I love the last line, but I'm kind of confused as to what's going on here. I think this has a whole lot of potential, tho. If you changed it just slightly, I think this poem could actually be one of your best, so I really don't mean to sound so discouraging.

nice line"a siege of a heart"