What should I do?

Vivi

One year ago I met someone who is my boyfriend now. When all started I told him everything about me including those boys with who I had been before him. There was a single boy I didn't want him to know about because I was afraid that he might change his mind and quit everything saying 'okay this is too much'. Recently he has found out about that guy so I told him the truth. I have never lied to him but he doesn't believe me anymore. He keeps reminding me of my past which was hell on earth for me and that I am a valueless person. I can't go on like this, what should I do? Sorry for my English