So what would you do?

I had a partner for 18 months. Very nice guy and very attentive. I found out three weeks ago I will never be able to have children. Today, when I got home from work, I found all his clothes and everything he owned gone. He has already found himself another woman. When I confronted him he laughed and said he wouldn't stay with a barren ***. As if I wasn't hurting enough. What should I do?