Looking at my boyfriend's QQ space, I saw his signature a long time ago, all in secret words with my ex-girlfriend, and my heart was very complicated. Why didn't he sign it for me?
Give him time to forget the past. And it shows that he is very devoted, and you should be very happy to have such BF. But don't always mention this in front of him, it will make him think you are stingy, or you have forgotten it clearly and will remind him again. I have suffered this loss, so I hope you can catch him. Try to take care of him and make him feel that you are very kind and important to him.