Don’t worry OP, I think it’s so normal.
I was with someone for just shy of a year a few years back, and he told me out of the blue that one of his exes, who lived abroad, had got back in touch and he couldnt stop thinking about her, so it was kinder to me to just end things with me. I was heartbroken. Disproportionally so, considering we’d been together ten months, but it was the hardest heartbreak I endured. I saw through his social media a couple of months later that he’d flown out to Spain, where she lived. I deleted him for my own good after that.
And then I moved on. Realised in hindsight he was a bit of an arse, didn’t prioritise me or treat me amazingly, kept me at arms length a lot, and I began to feel so glad it ended. I dated a bit, then met my current partner, who is incredible, amazing, perfect, wonderful. I couldn’t ask for any more and I’m so in love.
About a year ago I heard my ex was living in Spain and now married to this woman. And even though I was SO over him, glad to be rid, and insanely happy with my new partner, it still just felt a little..:weird. But I couldn’t put my finger on it. I couldn’t have cared less about this giy by then, but finding out he was married to the girl he left me for… I don’t know. Maybe I had just hoped out of spite that it wouldn’t work out. But it’s impossible for me to explain why I actually even cared by this point, it was about four years later.
Anyway it was a fleeting moment and my weird feeling about it only lasted a day- you won’t care by tomorrow!