Is it too late?

I was in an almost relationship with someone who now sees me as a friend, but I still have all these feelings for him. I'm currently the babysitter for his kids also.He has two kids and a third one on the way and I really want to tell him everything that I've been meaning to say but was too afraid to say to him.

I just wonder is it too late to say something? I know I need some closure, but I know I may never get it. I just don't know if I waited too long to tell him exactly how I was feeling about everything and how he hurt me. I know he's moved on, but I haven't even though it's been 6 months.

Should I lay everything on the table or should I just suck it up and try and mask my feelings?