Surprising revelation from your partner

What if your partner confessed to you that he never desired you as his lifetime partner and his choice is his ex, but because of some valid reason you got married. You've been together for almost 4 years but theres are alot manifestations of disrespect, dishonesty and unfaithfulness with your partner, he always decide on his own without listening and considering your opinion. How will you respond after the confession? What would be your reaction?