Well, he sounds like a fun guy to be in a relationship with, doesn't he?
I guess this isn't quite what you pictured when you first started dating him?
Not exactly your "happily ever after"?

This is who he is. There is nothing you can do about how he acts and what he says. He says and does what he wants. What is in his heart. This is what he has to offer you.

How do you respond?
Well, you can't change him. So, you can either accept this as "your lot" in life, or decide this isn't how you want to live out the remainder of your earthly days.

You can choose a different life for yourself than this one. Life is a multiple choice event and there are so many possible different paths.