I have lost both my parents. Yours is an important question. The total grief you are feeling now will not always be this intense. It's not so much that it goes away, but there will be spaces in between pain where you can function, enjoy friends, and other things. But even though my parents have been gone for awhile now, there are certain days when the grief rushes back. Their birthdays, Christmases, and so forth.
It's going to get better. I have to believe that. This raw, total, grief you feel now. .and I do. . . will NOT always be that intense. Will you always have some pain from this? Yes, you will. How could we not? But you will incorporate it into your life and say, "I LOVED someone that strongly, and that adds to my memories of joy."