Learn how to clean cut these chicks. If she has proven herself to be disloyal, a liability, or a complete waste of time, then cut her off immediately. Do not allow her to linger around. Most of the time, we keep these chicks around on some "I'm just gonna fukk her, etc." You want your roster to be full of thorobreds. Mark my words, this same chick is gonna end up being a big problem for you if you keep her around. You think you're playing her, when she's really playing you. Also, women have a way of trying to make you feel guilty even when they are dead wrong. Always remember "your word is your word." Never let a woman manipulate any of your words. Never explain yourself. What you said is what you said, and it is up to her to understand it. If you attempt to explain yourself, she will manipulate your statement and have you questioning what you said. This goes hand-in-hand with never argue with a chick. Sure, she might get mad, but when you're right, you're right. Never feel guilty for laying down the law.
Better yet, don't even give closure. Just say ok and move on. Women need closure whether they are the one doing the dumping or the one getting dumped. If you never give a woman closure to a relationship (acknowledging fault or explaining what went wrong) she will forever be stuck thinking about your situation for years to come. I simply move on, stop calling, stop texting, and stop all communication. No random texts, calls or anything. Women need men to feel like he's lost something great. If you don't respond that way (or at all), over time she will start to believe that she has lost something great. And it always works, regardless or not if she moves on with her life with another man.