Hello, I feel that you should definatly move on. It hurts but I don’t recommend wasting energy trying to make him love you/be with you. He wasn’t honest with you from the start and after the “fun” is over, he decides to tell you about the gf. That isn’t right and you don’t deserve to be treated like that. It is possible to move on if you allow yourself to.
It’s okay to remember the good times; but move forward and know that there are men that you can enjoy life with and be 100 percent available to you and only you.
Best of luck and may your broken heart be healed.