Yeah, me too.

Yes, it was essentially a love letter ending with “please call me“.

I actually did text him - since he included his phone number and I wanted to know who he was - but I “ghosted“ him after some months when he kept asking me to come to his home (he was twentysomething so several years older than me).

Afterward, I received one more postcard from him telling me how much he misses me and how he wished I was there with him (he was travelling at that time) but then it stopped.

Wow, that's very weird and very inappropriate of him, hopefully he got in trouble / didn't do that to anyone else. I'd be very anxious if someone had my home address and was harassing me, I'm sorry you had to deal with that.