two things I regret

I'll start giving a short overview of my experience with the narc, since I have not posted my full story yet:

We met online, he lived in America, but came to Europe to visit me in two occasions. He told me so many lies - from faking cancer to lying about being married, lying about his job, his degree, his whereabouts, his achievements, falsely accusing others of stealing money from him - so many lies that I'm not exaggerating when I say that the only thing I know was true for sure was his name and his age -because I saw his passport-. The rest was just full of inconsistencies, even the things I found out playing detective led to only more questions which remained unanswered.

9 months ago, when he was here, we had a small fight over something silly: I wanted to go home, he wanted me to stay. I got afraid because while trying to force me to stay he accidentally hurt my breast by pulling me, he apologized. When I got home, I sent him a message: "it's better we don't see nor talk to each other for a while". After this, I slowly started learning about PDs and decided I'd never talk to him again as adviced everywhere. I had not talked to him for several weeks, so I decided I would not contact him again to tell him I would not contact him otherwise I would have to start from zero again.

But two things have been bothering me since then:

1. not explaining why I was leaving, that he disrespected my boundaries and lied to me too many times. That he was given a chance to be my friend and he screw it up by trying to get more from me. I had stopped confronting him about the lies, because the few times I did, he denied everything, got mad at me or called me a liar. I knew it was pointless to confront him without irrefutable proof and I was never able to find enough, sometimes his stories just didn't add up. This gave him a good reason to call me heartless and cold for leaving without an explanation and make him look like a victim or like he didn't do anything wrong.

2. saying "for a while" instead of ”never again", which suggested it was not final, but back then I didn't know what a narc was, nor was I convinced I would be strong enough to stay NC forever. This again gave him an excuse to contact me and say "You said just for a while, are you ready for a chat now?"

I feel like if I had told him I wanted NC forever and explained why, he would've just moved on to his next victim instead of moving to my town and hoovering me ever since. He sent a message last week from a new number, saying he's in my city, got very sick and wish I was there for him. I blocked that number too and I'm changing mine, I ordered a new simcard and I hope it's delivered on Monday.

I feel I made a mistake and let the door open for him to contact me and say "hey, I didn't do anythinig wrong, why are you not answering?" or "hey, I didn't know you didn't want me to contact you, you never said you didn't want me to contact you ever again"