Men who have joint bank accounts, what are some tips and tricks for communicating with your s/o about the account

So my fiancee (27F) and I (28M) recently joined bank accounts. This is after we bought our house and was mainly my idea. We were sending eachother money for bills and it was just annoying. We both have access to the account, debit cards, all our money goes in and out from said account.
I pay all the bills, and usually know when what is getting taken out. My problem lies when I try to talk to my fiancee about it. Essentially we are trying to save for the wedding and I want to pay off some debt faster and it seems hard to talk about money.
Common things said are ?you stress me out? ?i work so i can spend it how i want? ?you get your stuff, so i can get my stuff?. I am trying to manage all this since someone has to but we are not ?struggling? as she says. Obviously right now we don?t have to pay student loans so it seems there is more money and it isnt a big deal, but in the very near future they will be back.
I know this could have been post in personal finance or relationship_advice, but I?m looking to get a mans perspective on the situation. My parents never talked about money so it?s hard to understand how and what to do.
Thanks


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