Online friend gone wrong, what am I even supposed to do?

A guy appeared seemingly out of nowhere on an online forum I use. He was kind and told me he lived in my neighborhood (like , he said we live close by and mentioned my neighborhood - definitely NOT random). I had never mentioned an address online, neither a neighborhood. It was bizzare. I ignore this message. Another one comes from a different account. He claims he has diabetes like me and that if I want to talk we can etc. I ignored that as well. He sent a how are you etc. I responded. Lo and behold, he says he lives in my neighborhood.

While talking to him, I comment on other posts and he messages me about what I commented one minute ago – it felt threatening. He was clearly stalking. He gave me other indirect hints he was stalking, too. It’s like he knows every comment I make. By the way, he knows where I hang out daily. I have no idea how. But he can clearly come and find me. He insists on meeting him there, like literally keeps asking me all the time. He knows I take care of strays and he uses an excuse that he wants to search for a spot to make a shelter for them. He indirectly asked me about details of the place I hang out and I tried lying about them.

I told him I was in pain today and he still kept asking to meet me. I am scared because he knows where to find me either way. I told him I’m ugly and he got angry that it’s an excuse. He gave me his phone number.

I am fucking scared. It’s like, I will either meet him by will or by force. I trusted him with a ton of personal stuff.

He bought cat food and left them by the church. He said he wouldn't be there so I went. And then I went to feed the cat. Of course he was there. He was couple of meters away and played around by sending me pictures of where he was. He did so in such a way that I felt trapped, froze and just started crying and shaking. He didn't care.

I've been nauseous since then, and I am generally paranoid now that someone is following me around, I look behind every couple of steps I take and when I hear a voice I panick.

He did not harm me or even talk to me. He was just after mental torture. But I still felt the exact same way when I was abused in the past. I liked walking. Feels ruined now.