Just found out my boyfriend has a wife , & they are expecting.

I am in shaking and numb, I don't know what to feel. My boyfriend and I have been dating for 2 years and I find out on facebook that he is married. And not only that but she is 22 weeks. I don't know what to do.. I've never had my heart broken before. What should I tell him? I am literally shaking. How could I be so stupid. What next? I don't know what to do...