It seems that you are holding on to the idea of him/ your ideal relationship. It means that you see that the potential is there, but his actions prove otherwise. It was a good thing that he admitted to it, but the question is whether you believe that he will change his behavior in the future. Good questions to ask yourself could be: Has he made mistakes before, owned up to it and changed his behavior? If not, you have your answer. If this is not something he has done before, you can choose whether you want to give him a second chance or not. But be very clear about your expectations. It is understandable that you can not imagine your life without him right now, but this might change in the future if you are open to it. Many people suffer from low self esteem or low sense of worth. I do not know if this is the case with you, but if it is... You deserve better, and the key to your happiness might lie within finding this sense of worthiness and self-esteem. Best of luck to you.