<human>: Could you distill the essence of the text into 1-3 sentences?

Three and a half years ago, I worked in a dual diagnosis (mental health disorder and chemical dependency) treatment facility. Well, yesterday, I get a really weird email from a guy who used to be a patient there. It was pretty incoherent, but seemed to be saying he wanted to get closure in regards to me touching him. I was like "....wat?" 

I then got another email from him a few hours later. Attached was a 2 page, single spaced letter he had written about how he was gay, and thinks about me all the time, called my parents to try and find where I was (I remember my parents telling me a few years ago that some mental health patient called, trying to find out how to contact me). I am guessing he got my email address from google searching my name, finding my youtube page, and seeing a few videos that have my email address on them.

He goes on about how no one ever touched him like I did (???), and how he wishes he would have accepted my advances. I have no idea what I could have done to give him such an impression, since I have a pretty strict "no touching!" rule with patients, and work very hard to maintain a professional relationship, so they know I am not their friend.

Anyway, I am not sure what to do. Do I call HR, even though I don't work with that company anymore? Do I just ignore it? I am thinking he either made this whole thing up in his head (he is schizo), or maybe it happened with someone else (maybe even another patient), and is somehow attributing it to me. I really am kinda freaked out about it.
<bot>: A past mental health client of mine thinks we had some sort of pseudo-relationship when he was in treatment, and is now sending me weird emails.