(Throwaway account as family know my username)
Backstory: aunt has an old friend from uni days. When I was 18-ish he was late 40s. We were friendly, I went to visit him in my early 20s, considered him an honorary uncle. From various comments made, I suspect he had a "friends with benefits" arrangement with my aunt.
Looking back on things a decade later, I realised how inappropriate things were. He was very keen to be friends with me, have me to stay etc. Probably nothing illegal, but definitely wandering hands, insisting on a kiss on the lips...
Roughly 5 years ago he and my aunt had a falling out, I don't know why. He disappeared from the family circle. I honestly thought nothing of him for the last few years.
Yesterday, out of the blue, I received a very long email from him. He talked about considering me a friend apart from my aunt, then discussed many painful issues in the last few months (significant bereavement, ill health, financial issues). He asked me to visit and to help him. He was clearly very distressed and struggling to cope.
I'm now nearly 40, and he's 70.
I feel incredibly guilty for not helping, but I'm surprised about how anxious the contact has made me
AIBU to be polite but distant? What should I say?