Maybe that woman still love your man.
You and him take time sit down and talk things out as an adult. Then make a decision together, after all this relationship belongs to both of you. What is that he hopes for in this relationship, what is the gap in between is it time/personal space/misunderstanding/miscommunication? Was he unsure whether you love him? Was he not feeling that you love him? Get him to talk and laugh as before, that's what relationships is about. The lost smiles, the lost laughter, the lost butterfly feelings, the lost eye contact, if it is all worthy, get it all back because you are the real girlfriend. But if he is not what you want to be with, the man you don't want to hold his hand no matter what happens, then just let it go. It will hurt definitely, but you know what is yours is yours, what is not yours is not yours.