AITA for calling off my wedding after finding out my fiancé was hiding a secret bank account for years?

Okay, so this is a bit of a long story, but I’ll try to keep it concise.

I (28F) have been dating my fiancé (30M) for four years. We’ve been living together for two, and everything seemed to be perfect. We’ve had a really strong relationship, great communication, and honestly, I thought he was the one. We’ve talked about our future together, marriage, kids, you name it. We’re both in a comfortable place financially—he makes a decent living, and I have a well-paying job as well.

Here’s where things got… strange.

Last month, I was going through our joint bank accounts to finalize some wedding plans. We were talking about setting up a joint savings account for the wedding, and I wanted to get everything in order. When I logged into our joint account, I noticed something odd. There was a small deposit listed that didn’t make any sense. It was a large amount of money, but it wasn’t from his salary or any kind of transfer we’d discussed.

I confronted him about it. He seemed flustered and told me not to worry about it, saying it was “a bonus” from an old investment he had. But, instinctively, something felt off. So, I asked to see the details of the investment. He dodged it and said he would “take care of it” and that it wasn’t important.

My gut was telling me something wasn’t right, so I did something I’m not proud of—I looked through his things. I know it was wrong, but I felt like there was something I wasn’t being told. I found a folder hidden in his desk that contained a separate bank account statement. It was his personal account, one I didn’t even know existed, and when I looked at it, I saw that it had over $50,000 in it.

At first, I thought maybe he’d been saving up for something special, but when I looked closer, I realized that this account had been active for YEARS. It was full of monthly deposits from his paycheck, but none of that money was ever mentioned to me. I had always assumed that we were saving our money together for our future, our wedding, and our lives. But apparently, he was keeping this money to himself.

I confronted him about it, and he looked completely caught off guard. His excuse was that he was “protecting me from financial stress” and that he didn’t want me to feel pressured about money. But honestly, that made no sense to me. He’d been hiding this from me for years. I asked him why he couldn’t just tell me about it, and he said it was because he was "protecting" me. But all I felt was betrayal.

I told him that this wasn’t okay—that keeping secrets about money, especially a large sum like this, was a huge breach of trust. I said I needed time to think about everything, and after a lot of thought and sleepless nights, I called off the wedding.

Now, my friends and family are split. Some think I’m overreacting, saying that he probably had good intentions and that money shouldn’t be a deal-breaker. Others say I was right to walk away since the trust was already broken, and if he was hiding money from me, who knows what else he’s hiding.

So, AITA for calling off my wedding over this? Or should I have let it go and moved forward with the marriage?