The man was grieving over his wife's death.

Lady Montague dies grieving for her son. Her husband informs the Prince of her death in the Tomb Scene.

It is not normal to be grieving a death after 2 years. You should talk to a grief counselor or certified therapist.

One can find poems about death from any of the numerous websites that contain databases of poems. Once at a website like this just type in "death" in the search bar.

No, its normal, you are grieving. You're only human.