I’m not sure I understand this.
I’ve been cheated on, and I am hypersensible person, so it was a very dangerous, painful experience.

But, I still see this as pointing fingers. There are gems of wisdom that keep me thinking about that, for example:
‘There is no such thing as a free lunch,’ or ‘every action has an equal and opposite reaction,’ or ‘it takes two to tango.’

No, wait, you’re right - it is something going on in the mind of the cheater. But it’s the reason why that’s more interesting.

I’m not trying to insinuate that it’s your fault for your partner to cheat on you, but if you were the perfect person for them, would they still cheat on you?
It’s not your fault, but I believe it’s about some differences between you. And those differences can always be dealt with, from borh sides. It’s only a question if you two are fit to deal with them.

It’s interesting (to me) to think about how many neglected, cheated partners run away from their relationship, only to later end up in another, similar one.

‘Is there anything that you could change within you’ should be the only question that matters.

By the way, to not be misunderstood, I don’t approve cheating and believe that relationships nourish and grow on accountability berween both partners.

And when you get married, you don’t get to cheat or leave (with reasonable exceptions for the latter). You need to present what you are made of to forge or justify for a good strong relationship.