It’s natural to reminisce and grieve over loss. That person you knew is no longer with you (at least as you knew them). Like any loved one you don’t truly ever forget them, but you do learn to grow and move beyond. So celebrate the life that got you to where you are and bid them a fond adieux. Remember the good and the bad because they shaped both of you. Laugh and cry over the pains and the joys that filled your life. Then raise a toast to both for having the strength and courage and love to move on to this next life.