Hey Saxman, this is a tough one to chime in on. You know better than anyone else what is the right thing to do.
The One. The one wants you there? The One knows your going to suffer through it?
That one, isn't the one. Go do something else. I don't know a damned thing about what the entire situation is. But I do know this. You owe no one anything. You said you'd go so you feel obligated. You are not obligated to a thing. You put that on yourself. Do you want to go? That's a Yes or No that you need to honestly answer to your self. That's all you owe anyone. It's ok to tell someone to go pound sand and simply walk away.
If she really was "The One", you wouldn't be having this conversation with anyone.
Ya, Ya, I know, I'm a cruel, cold and heartless bastard. It's served me well, and my relationships are more honest now because of it.