I'm going to cuss out my friend and reject her wedding invitation
Why would act so hatefully towards your friend?
She, like many others, are so inconsiderate these days and I don't think she understands how it would make me feel to attend her wedding. I hate her.
It sounds like you are out of line. Your friend is just trying to be nice and invite you to her and you are just being rude.
I don't care and I'm not changing my mind.
Your behavior and desire to yell at your friend is quite inappropriate and I question as to whether this person is really your friend. I think declining the invitation is a good idea and then you should probably end the friendship in a civil way.