BF betrayed me with his ex steps on how to move forward

HI, My BF of 3 years, today confessed he's been seeing his EX behind my back I'm, I had sensed something was wrong; he would never admit anything was going on. Today I ended the relationship. I need advice on how to move on and deal with the "uncoupling" and all the emotions that go along with that. I'm hurt, sad, feeling of despair.

Thank you so much for responding. I believe you hit the nail on the head "I didn't see him for what he really was". His lies were always stupid and made no sense. I see the real him now in 20/20; thank you!!!

I agree with SUSSIEDQQ. Your life is more important to you than his.