No one is going to forget someone they "really love".
Just because it did not lead to a "happy ever after ending" should not negate all the great times you had with the person. The focus should be on the total experience and not just the ending. "Don't cry because it's over, smile because it happened.”-Dr. Seuss
Forgetting someone you really love is impossible! Letting the dream go is possible! You begin by accepting the reality that it's over and gradually move on with your life. Realistically out of 7 Billion people on the planet there are lots of people with the traits you value in person. Falling in love and being loved is only limited by your willingness to be open to receiving and giving love.