Describe a time when you told a friend an important truth

A couple of years ago, I found myself in a rather delicate situation with my close friend, Marcus. We had been flatmates for nearly three years, but he had recently started a business venture that, quite frankly, was heading for a financial cliff. He had invested almost all his savings into a niche retail concept that was clearly failing to gain any traction in our local area. Watching him pour more capital into this sinking ship was painful, but he was so blinded by his initial optimism that he refused to acknowledge the mounting debts. I realised that I had to step in, even though it risked our friendship. One rainy Tuesday evening, I invited him over for a coffee and, with my heart pounding, told him the hard truth: his business model was fundamentally flawed and he needed to pull the plug before he ended up completely destitute. It was critical to speak up because I saw his mental health deteriorating under the pressure of maintaining a facade of success. I knew that if I didn't say anything, he would eventually lose everything, including his flat and his credit rating. Initially, Marcus was quite defensive and even a bit cold, feeling that I was undermining his ambition. However, after a few days of silence, he came back to me. He admitted that my words had been the wake-up call he desperately needed to stop the bleeding. He ended up closing the business, and while it was a tough period, he eventually thanked me for having the courage to be honest when everyone else was just being polite.