Learn today, women are loyal to their feelings not your sacrifices. Women will always do what's best for them. Never give a woman more than you give yourself. The more resources you give to a woman, the less you allocate to your own development.
Whatever you do for a woman, never take it to be an investment, expecting a anything in return,just take it as more of a donation/charity. Which is why before you get into a relationship, you need to be clear about her place in your list of priorities.
When you meet a woman who demands more of your resources than you're able to allocate, immediately abort that mission. Know this, a woman will always demand more, but remember, when your resources disappear or you're of no use anymore to her, she leaves.
And guess what, when you start whining to her about how much you sacrificed for her, she'll tell you "did she force you" & she will be 100% correct. It's your own foolishness that made you think you can buy a woman's loyalty.