Death of Dad impact on my relatinship

How do people cope with anger during grief. I got so angry yesterday with my partner. He made a fly away comment and he was not very sensitive. I snapped at him. He seemed not to care.

We have just moved in together and he was very supportive at the start. It is very heavy right now and putting pressure on us. We don’t live together full time . I am finding it hard. I lived on my own for 10 years. He is not proactive and waits for me to make decisions.

I am thinking of living in my own and getting my own place and just go back to dating him

How do others cope with impact on their relationships.