I am very good friends with my old drama teacher who was there for me a lot when I had anorexia at school. Just after I'd left school she invited me out for lunch and after that we met up every month or so until the following year when I moved away for uni. She became just another friend from home that I'd make the effort to see whenever I was back for the holidays. After a year she moved away to be closer to family (she'd just had a baby), but I met up with her a couple of times when I was visiting a friend who lived near her new place, and we chat every now and then online.
It's now over 5 years since I left school and when I felt myself relapsing with my anorexia a few months ago I messaged her and she was supportive as ever, even inviting me to come and stay when I was deemed too ill to carry on with my nursing placement. I ended up staying with her for a week, hung out with her family, including her parents, sister in law and nephew and helped her take care of her kids. When the kids were in bed, she'd teach me to cook something and then we'd watch telly and drink wine while we ate.
I don't find it strange really, I think it's really nice that she still cares and in some ways it's odd to think she ever taught me. She's only 10 years older than me, and I'm actually almost as old now as she was when she first started teaching at my school. And she was only actually my teacher for a year - in the three years after that I just did the school productions that she directed.