Needless to say, nothing needs to be expressed. You only blame yourself at first. There is no regret medicine in this world. Now that you think about his goodness, it is obvious that you still love him and miss him, and your heart is full of him. However, this is just thinking, just thinking! It's impossible to start over together. The past is always the past, and regret and regret are irreparable.
There is still a long way to go, and there will be many men in the future. Why not start over, find the bits and pieces of life, and find the person who will care more about himself and take care of himself than before?