I think my fiance isn't entitled to any of my tax return
Why would you not share the tax return money?
I don't see why the asshole would get any of my money.
If you didn't a file joint return there is no reason you would have to share your money. Is he sharing his money with you?
I don't think he needs the money anyways.
There is nothing wrong to keep the money that you have earned. Can you tell me what he planned on spending it on? Like were you saving it for your wedding?