It CAN be too late

It seems like my husband is changing quite a bit recently-to calm, attentive, supportive, understanding person that's also patient s and not about to blow up if I open my mouth. What caused the change? I'm clueless as we are not talking about " elephant in the room " at all. So, currently, there's nothing to be sad about or wish for. But, I can't stop crying, severely and multiple times a day. Because 10 years together broke me. I desperately want to re commit and enjoy things now , but I'm totally depleted. I have nothing left to put into rebuilding relationship. 
now he can rightfully claim I AM the broken one. Because I am:(