When I was about 12 me and my friends met a woman that lived in the old people's home in my street and started going round hers to visit. We used to chat, play cards, feed her cats, go shopping with her, it was a strange friendship but we all liked her.
After a while me and my friends fell out so I stopped going as much mainly because I didn't want to bump into them. After we'd started talking again I still hadn't gone much and I didn't go at all after my nan had died, then a couple of months later I was told she had died. I fel bad that I hadn't been to see her for a while before it happened. I was really mad that my friend didn't tell me when the funeral was because I would really have wanted to go (he also spoke to her daughter so he knew and went).
I don't think of it like that anymore though, it's not important if you said goodbye or what else you didn't say, just as long as you had good times.
I wasn't expecting to type that much.