Get over it. It’s time to move on. These and other bits of strong advice from others are heard by those who grieve. It seems it is always the one who is not walking in the shoes of grieving that claims to know what you should do.
The loss of a loved one is a complex experience that will last a lifetime. First, learning to accept the death of someone close, then learning to adjust to life without their presence is a lifetime experience.
Look at it this way: death does not affect the love you have for someone, but only changes the way that love is expressed. As you loved, so, too, will you grieve for grieving is an expression of your love. Heart-felt love doesn’t require a physical presence. This kind of love transcends all.