Another friend lost

Well today we lost a very dear set of friends, they have chosen to not see us anymore as result of an incident involving my husband and our cat that their Son witnessed. The stress is showing on my husband and he is very worried about what will happen with his leg and our family if things go very wrong. I don't know what to do to reassure him as if he was to lose even a percentage of his income we would be in trouble as no matter what I do he earns way more than I do. I guess I am scared too! I am also really sad about losing these friends because our boys were really good friends and I know Spencer will be upset when he figures out they are not coming back to visit. This happened once before when we were going through fertility treatments and he is too young to remember but now he is old enough to understand. I am going to have to find a way to explain this to him and that breaks my heart. I hate to hurt him and feel badly that because of us he is losing two of his best buddies. I am scared now to be bringing these kids into our house because he will get attached and what happens when they leave? I am just bringing a world of hurt on him? Why does life have to be so complicated? I have just sent a message in hopes of trying to salvage some kind of relationship for Spencer but I just don't know.