Emotions definitely affects health and negative emotions can trigger negative health

Yes depression, and sometimes I feel that elderlies when they lose their spouse :(

The word for it is depression, but if that leads to death then it could .

It's very plausible if a broken heart leads to lack of will to live

Yes... too sad, mental breakdown... and then you die in the inside.

If it results in severe health and mental callousness and impact

Yes, indirect causation, it could make you do stupid things

No it’s not, I mean there are so many fishes in the sea

It's up to the person whether he wants to let go or not

What happens after heartbreak may lead to death