Boyfriend earns WAY more than I thought, should I confront him, and how?

Anonymous
So, when we moved in together we both laid out how much money we have available for bills after savings, and his was a little more than mine, so we were able to get a nice place and live a fairly comfortable life as long as we don't go silly, and we split all household bills 50/50.

Recently I found one of his bank statements and couldn't help myself, and I realised his income was over double the amount he said he had available, he literally puts half his pay in savings account, and there was LOT of money in this account.

I feel so mad about this, a lie of omission, we could be living a better lifestyle, or he could be picking up a bigger share of the bills.

I feel this is a betrayal of my trust that he kept this from me, how do I approach him about this?
Updates
+1 y
So I talked to him and well... he's really mad at me for violating his "privacy" even though we've lived together for 6 months now, and after he calmed down after forcing me to admit I was wrong to snoop, he explained that his parents taught him very young to always have his expenses never amount to more than 50% of his income and save the rest, and I said that spending / fun money shouldn't be included in that and that he should relax a little but he refuses, said it's how he's always lived
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1 y
Sorry for late reply, but looking for a new place to live, he broke up with me after a fight where I just tried to encourage him to live a little with his money
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1 y
Now he's messaged me saying that in the next 12 months he will be buying a house outright, that's how much money he has saved and earned from investing; WHY WOULD HE SAY THAT NOW?
Boyfriend earns WAY more than I thought, should I confront him, and how?
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