I'm going to end it with my fiance because he's terrible with money
Is your fiance that bad with finance?
I think his addiction to spending money hurt our relationship badly.
This sounds like a good time to sort things out before you get married. It's better to work things out about money than to break up over it.
Nope, he's been a controlling prick and I feel like I have no other options.
There is always an option. Ask for financial help and talking is the first step to tackle that kind of problem.