Knock yourself out with your fun.
Thinking you can control another person in such a way that they will love you unconditionally and never even think about leaving you is a delusion.
Your feelings might not change in the next 50 years or whatever, but you never know what a person is capable of doing.
I don’t know about you, but I’ve never bought the nonsensical idea of unconditional love. While I also don’t presume I can control others nor care to either.
As for myself having been divorced in one instance, I know the world certainly won’t come to an end if I get divorced again.
It’s okay if people’s feelings change, that’s just part of being human. I still have fond memories of past sexual relationships, including my first marriage, Yet all such relationships come to an end, and that’s also okay as well.
That said sharing sex matters to me more than it does to some others (like the men who stay in sexless marriages). So if my wife turns her shared sex with me tap off (which is entirely up to her), I will have no qualms in seeking other sexual partners to try to satisfy my sexual appetite. And that’s okay as well.