My 7 year old says he wishes he were dead. :(

In the past 2 years my 7 year old has seen his dad and I separate and meet new people. Within those 2 years I got married and had my lo while his dad was back and forth with his gf because she was cheating. On top of that his dad has a new job that only allows him to see him every other weekend rather than every weekend like usual. And finally he just found out his dad is expecting a baby in May. He went from having his family together and being the the only child to having 2 families and now 2 siblings. My heart breaks for him and I hope it gets better soon because I hate for him to hurt.