Moving on feels like cheating on my ex

My ex was a typical narcissist, and I fell for it

We broke up because I “did something wrong” and tried to give me a chance to redeem myself but I walked away and he sent me paragraphs, saying “goodbye” but I didn’t really care for it.

I realized how possessive he was, and how controlling, now that I’m out.

I’ve been on a few dates with men, but I feel like I’m cheating on my ex.. even though we’re not together

I feel like for some reason he still owns me???

Why do I feel like this & how do I get rid of it?

I’d never go back, I’m an all or nothing person so I’m done.

Maybe I’m not completely over him, but I just know I wasn’t supposed to be with him forever & I don’t know