Most Helpful Guy
Well, how exactly do you know that you were second choice?
I'm not doubting this, because a lot of guys do this, so it is likely, but really what difference does it make? You're not going with him. You're not dating him. He's not dating you. It seems you're not the greatest of friends.
Do you have a right to be offended, absolutely, but something I've learned in recent months is its way too much effort to hold a grudge over somebody for something as lame as this. Yes he's in the wrong. Yes, he's using you, yes you have a right to be upset, but I wouldn't dwell on it. Go out and enjoy your New Years Eve!