My husband has been prioritizing his best friend's financial needs over our household. How can I address this issue?

My husband, Rich, and his best friend, Tom, started a business together six years ago. While it’s mainly Rich’s venture—he conceived the idea and handles over 80% of the workload—it's been struggling significantly. Calling it a financial burden would be an understatement; it’s essentially a money pit. The only reason it’s still operating is that Tom has been selling off investments to keep it afloat. For the record, I urged both of them to shut it down two years ago. Rich was ready to quit, but Tom wanted to continue, so Rich kept working. He feels an overwhelming sense of gratitude and guilt towards Tom for his ongoing financial support. If, or rather when, the business fails, both of them will have to declare bankruptcy. Fortunately, due to our state laws, Rich’s bankruptcy will only impact our joint assets, which means our house, cars, and my personal savings will remain safe and sound. I’m currently not working due to a disability and a surprise baby. My personal savings were meant to cover several months of our family’s expenses in case of Rich’s business failure and his job loss. Unfortunately, I’ve had to dip into that account multiple times over the past six years, leaving it significantly depleted. Last winter, we found ourselves in a tough situation where we couldn’t make ends meet. For several months, we went without essentials until I had to once again use my personal savings to fill the gap. In the spring, I discovered that during this time, Rich was only taking two-thirds of his salary, which made me extremely frustrated. This, among other issues related to his startup, led to us beginning marital counseling. Recently, during one of our sessions, I learned that he had been taking a reduced salary for a much longer period than I realized and had depleted our joint savings to lessen the amount of money Tom needed to invest in the business. I vaguely remember him mentioning a reduced salary long ago, and since that money would likely be lost in the upcoming bankruptcy, I’m not overly upset about that. However, what truly angers me is that after draining our joint account, instead of asking Tom to restore his full salary when we needed it, he chose not to for fear of adding stress to Tom's life. He admits he should have discussed this with me more openly, but now I can’t shake the feeling that I was excluded from crucial decisions and that he prioritized Tom over me. I feel deeply betrayed. I'm really struggling to move past this issue. Rich's startup is a significant point of contention in our relationship, and I no longer trust his judgment regarding it. On the flip side, he is a loving husband and a devoted father, and our counseling sessions have been beneficial. I’ve come to understand through therapy that I find it challenging to let go of the past and that I harbor some bitterness towards his business endeavors. Rich doesn’t seem to view this situation as a major problem. Am I being unreasonable? Regardless, how can we both move forward from this?