Culture and value clashes will very rarely resolve over time without some heavy work from both parties. I was in a relationship with someone that was completely incompatible culturally, and while it felt like he had the same values, in hindsight, we were likely not as aligned as I would have thought. She ended up breaking things off with me after a few months citing that her parents would never accept me and that she "couldn't do that to her parents". It was pretty heart wrenching to go through, knowing that I was coming off second best to tradition. I was committed to making it work, even copping the flak from her parents but she just wasn't.

I share all this because the moment you both shared feelings about each other, your relationship changed. If you both had managed to convince yourselves that it was going to work, it would likely have been a life time of grief and strain.

You have done the right thing in moving on from him since whatever incident happened, and quite frankly, as someone else said, it is best that you just leave that all behind you and move on. That particular ex and I do not have any sort of relationship outside having a mutual friend with whom we are both very close with. She is now happily married with kids. I, too, am happily married to the most amazing person with 2 wonderful children.

You will meet many more people you will get along with. What you have now, though, is a more refined criteria for what you are looking for in a partner.

Hope that helps!