You’re not worthless. He is. He apparently used you to get money. To him words of love are just part of a game you didn’t know you were playing. He didn’t fall out of love because he was never in love. It’s fortunate that you found out before you married.
Please stop beating yourself up. Con artists are so expert at conning that they often have many, many victims. You had no way of knowing that he is a user and a thief.
As you already know, drinking, drugging, and sleeping around doesn’t change anything and certainly doesn’t help your shaky self-esteem. Stop talking with this guy except about money matters. Better yet, let a lawyer handle that. I’m glad you’ve contacted a counselor and hope that by the time you read this response, you’ve already had an appointment. You need and deserve the support. I hope that counseling will help you find ways to both recover from this blow and build your courage to try again. There’s someone out there who is worth yout time and your love. But you have to develop more self-confidence to find him.
I wish you well.