You can keep his memory in your heart and look for it for comfort on days you feel scared in the world all by yourself, but if I know one thing it’s that things will get better in time.
Unfortunately you have to suffer through the bad days in order to reach the good ones, but you will heal at your own pace and you will smile again. You will fall in love again and you will remember what it feels like to live without him. You will move forward and everything won’t feel so dark and lonely.
When he leaves you and there’s no changing his mind and no getting him back you just have to move forward because that’s all you can do.
Move forward and know that there are better days ahead because there are, there certainly are.