The Disappearing Act, Holiday Style

Q: What does it mean when a guy you were dating stopped all communication with you out of the blue and then tells you a month later that he did it because he got scared and didn't know what to do and didn't mean to hurt you? And then when you see him a few days ago, he tells you that he is so sorry and didn't mean to hurt you but knows he did and knows that saying sorry will not help, so he wants to prove that he is sorry. He also said he needs you in his life and doesn't want to lose you, and wants to work on this because it's what he wants. Is he being sincere? – Fingers Crossed