Jess,
Even after reading your posts, I still don't understand why you are leaving. It sounds like you are overly stressed, so maybe it is best that you take a little PT vacation. But, why make it so final? Why don't you just say that you are going to take a little break, and see what happens...that way, the door is still left open. I know sometimes when I am stressed, and feeling like I have the weight of the world on my shoulders, a little blowing off of steam is really helpful. Then, with a few nights of decent sleep (which seems like you are really lacking) can help alot!! I think from the responses here, your presence is wanted, and appreciated. I hope you will reconsider, and stay around, or at least visit from time to time...
Johanna