How to deal with mother's death
Lost my mother 2 years back. Now my father is lonely. It breaks my heart to see him like this
Losing someone can hit you really hard. It is perfectly normal to feel grief if there was love. Now I understand that seeing your father like this breaks your heart and it is normal that you want to see him happy again.
What activities he used to do before that made him smile? Try to help him implement those back into his life so that he can remember that there are many things that can make your day better.
It's also important to be patient with him and to realise that we each process our feelings differently and as long as we try to help, we did the best we can. The rest depends on the other person.
I admire the fact that you want to help him. The best of luck!