I know exactly how you feel because that happened to me. It does feel like the end of the world and you cannot imagine how life will go on now that he is out of your life. Nothing that I am going to tell you right now will make the pain stop right at this moment because we need time to heal and deal with the fact that our lives will change, but I know for a fact that you will survive and you will get through it and like any pain one day it will be a distant memory and you would have forgotten how bad you were feeling. Just know that there is so much out there in the world and you can and will find something even stronger and more fulfilling than what you have now. I know that you probably do not believe that now, but with every breakup, you learn something about yourself and it becomes a growth experience. Give yourself the time you need to grieve and adapt to your new existence but know that this is just temporary and that you need to take care of yourself mentally and physically.