my boyfriend told me he wanted us to start splitting every expense exactly 50/50 because he believed relationships should be equal. i agreed, and we started keeping track of everything. rent, groceries, dates, even fuel. a month later, we went to visit his parents, and i paid for our dinner because he'd forgotten his wallet. when i reminded him to send his half, he looked at me like i'd insulted him and said, “you're seriously going to charge me for dinner with my own parents?” i reminded him of our agreement, and he said…