The girl you meet isn't going to be the same girl you end the relationship with. They will all converge to the same AWALT type of girl. There are no exceptions no matter what people tell you, women just hide it better. It's a biological directive to seek out other men once enough time has passed between you copulating with her and raising a child to the point where they can take care of themselves.

At that point, you have fulfilled your duty in her eyes and she will seek to extract as much resources from you as she can before moving on to her next target. No matter how chill you think your woman is, she is a prisoner of her own hormones and body. With 200cc less brain matter on average than a man, women are base creatures with far more sensitivity to instinct than higher level functionality.

I remember looking at my ex-girlfriend when we were breaking up after 6 years of being in a relationship with bewilderment. I was careful not to commit because I knew it would end the way it was, but it was like she was having an automatic reaction. Her body was rejecting our relationship. Little did she know that I was making more money in a year than she could amass in a lifetime. I deliberately hid that detail to make sure the attraction was purely do to physical and personality reasons.

We came together because we found each other attractive and were chill together, but I knew a woman will steadily lose attraction towards her mate as time goes on. When she reaches zero, she will switch over to resentment. Do not take it personally. Never commit under today's laws and if you're already in a relationship, plan accordingly and leave around the 2 year mark. Don't stay as long as I did and live through the resentment phase. Leave on a high note, even though you think it will break her heart, know that women do not have hearts. They are base machines used for reproduction and nothing else.