[Jamie89]

I'd ask her directly what's going on, that you know she invited everyone except you and ask her why. You can't resolve it unless you're both totally open with each other and since it looks like she won't be, you'll have to be more direct with her. Then take it from there. If it turns out she hasn't invited you becausr there's people going that don't like you then I wouldn't be happy about that if it were me. Maybe she's not as good a friend as you thought? You need to talk to her properly about it though.