Perhaps, but I don't like going somewhere so others can help me, especially not when I will be a drag on the festivities.  I am never comfortable being helped; I'd always rather give help myself.  I absolutely refuse to pollute a happy event with a cloud of melancholy.
This is something I've been thinking about since November, and while the reasons have changed somewhat, it wasn't a decision made lightly.  It may change if I become cheerier in the meantime, but if I don't, I won't be around.  You'll have plenty of fun without me, I am sure of it. 🙂