CT when my D was about 5 she was having some issues. I asked her if there was something she wanted to talk to me about. Well, she erupted with so many feelings. I check in with her often to see if there is something she needs to have a heart to heart about. I'm the one she feels safe with expressing those feelings.
Your son feels safe expressing those feelings to you. You are his rock and safe place. Just keep being there to listen. Sometimes all my D wants is someone to talk to and get things off her chest. Sometimes the things are heartbreKing to hear. But you are his comfort and by listening and validTing, you are doing him a world of good.