Can the quality of relationships affect the development or progression of cancer?

I think "No" It's politically incorrect to doubt the pop claim that "life experiences affect disease". I have 30 years in medicine and was a chief debunker of pricey "positive attitude to slow / treat cancer" cultism. All but one good study yielded negative results, as one would expect from a disease unrelated to emotions & caused by accumulated mutations. Yet -- i wish you love in this difficult time.