If We DO NOT See Our Loved One In Heaven, Will We Feel Sadness?

In this episode, Dr. Betters answers the question, "Will we know recognize our loved ones in Heaven... Your answer was you believed we would. My question is if in heaven there will be no crying sadness or sorrow how then would we recognize our loved ones what if some don't make it to heaven will they be erased from our minds? If not wouldn't that cause sadness knowing this ?"