Lately I've been feeling like I don't want to discuss a wedding date.
Why wouldn't you want to discuss something so important?
I honestly can't afford it and I'm forced to do so by my parents
I see.  You shouldn't get married just because your parents are forcing you to, that's terrible of them!  Bail on the marraige!
My parents have so much money; I don't think money is an issue. I just don't want to get married right now. I'll talk to her about it when I'm ready.
Communications going to be key with this. It's a tricky situation with your family, but you need to let them know you are not ready for marriage.