Why women resent men after breakups.

As a woman of conservative nature, who puts high value on herself and body, I find breakups to evoke feelings of disgust and somewhat shame especially if the relationship was sexual. 
Culturally/ socially even religiously, women are taught that their bodies are sacred and should only be shared with their husbands in marriage. Though this is becoming an extremely difficult value to uphold, (staying a virgin till marriage), a conservative woman still wants to share their body with the "right" person.

As people and the world evolves, men and women to some extent are finding it difficult to commit to one person. Well I believe its due to women becoming more liberal with their sexuality and improved financial statutes. Unlike in days when a woman would stay, in an abusive marriage, for financial security, most women work and don't need men in that sense.

Even with this shift, there are still women who place high values on their bodies (cake). The difficult part now comes when a woman needs to decide to give it up, since the "after marriage" part is fading away. What would a man do to convince her that he values her so much that he deserves the ultimate price? Mistake women do (ill speak about conservative ones) is giving up too soon, without really knowing whether he values you  or not. If it turns out you sold yourself short, then resentment kicks in. "Who is he to think he can fuck me and leave me?" The second scenario is when you now in a relationship and decide to have sex because you think he's descent, and he obviously wants to have sex. You still not sure if hes "the one" at this point, but you have sex anyway because unfortunately you want to please him. Then you breakup, guess what, you sold yourself short again, resentment! 

Women can carry up to so much pain or resentment, some then choose to change their values,  make sex just another activity people do with no expectation. These women plan to go out to have fun and find some good dick. That's it for them, no expectations, no disappointments. I can't, however comment on the long term emotional and psychological impact of this (pending research).
 As for some, they still put some value and decide that men need to spend some money on them to show commitment, I mean what is a man's greatest asset if not his money?  Unfortunately some men have lots of money, so it still means nothing to him, even he spends thousands on different girls. But this makes some girls happy, as long as he is giving them money which equals the value they have attached to themselves, all is good.  These women are less likely to be heartbroken after breakups, as their monetary expectations were met. They may however feel devalued or under-compensated for the amount of sex they gave, which is likely because sex is also an emotional investment. The body can be compensated through shopping sprees, new hair, clothes bla bla, all the benefits that come with money. But if the emotional expectations was are not met, there is still a void.


In my opinion all the relationships mentioned above are somewhat unhealthy and create resentment and pain. What do we then say is a healthy 21st century relationship (for women)? Is it the one with a reasonable balance on emotional and financial fulfillment?