Brothers relationship

Faith

My brother is getting a divorce. He recently moved in with me and has his kid 50 percent of the time. His ex wife is asking him to meet her new boyfriend.. saying that he is the one. What can I say to him to comfort him through this hard time? He has a history with drinking and other substances and I’m worried for him. I’m not very good with consoling people and actually helping them. Any advice would be much appreciated 💖