To cut a long story short, I became friends with a much older man at work (30+ years my senior). It started innocent enough, but gradually he he started to change and try for physical affection with me, including holding my shoulders and kissing me on the lips. Insisting on hugs and holding my hand etc. Getting jealous when I spoke to male colleagues. Messaging me with declarations of love etc.... as a result I avoided him whenever I could, which meant changing my work hours to come in later so I wouldn't be alone with him, and stopped messaging him back. All I wanted was a friendship in my new job.
I didn't tell HR because I didn't want the fall out - plus I was worried I would be blamed somehow.
Anyway, he has started to message me outside work again, and said he wants to be friends like the beginning. I said I don't think that's possible because I know what he thinks and what he wants. And I know he will try his luck again.
He then asked 'why did you say you love me when we went to x'
I did not go to x with him or ever say I loved him. He insists this happened, he said he remembers everything but this certainly didn't happen. The fact he's possibly imagining scenarios in his head and thinking they are real concerning me is scaring me. He's in his 60s so I don't know if he has a health condition possibly. But I'm worried about what he's imagining happened between us.