My boyfriend owes child support... a lot!

So today I was at my boyfriends house, he was in the shower and I saw a notice from the department or revenue. It was an Annual Notice of Child Support Delinquency from the Massachusetts department of revenue. It says he owes nearly $10,000 in arrears.... First of all, I didn't even know he has a kid! He's never mentioned it to me before. He doesn't have any pictures of his kid. 10k seems like a lot to owe.. He is a sub contractor and makes enough money to live a good life. I really like him but I don't want to be with a guy that doesn't take care of his baby. Why would he hide this from me? Ugh I don't know what to do, should I confront him? Do you think he's waiting to tell me?