RIP in Peace
There is no acceptable reason why a guy you broke up with should text you, telling you how much he loves how, how you’re his everything, and that you’re the reason he’s alive and breathing. This is especially true if he’s your ex and if you wish that a thousand dogs would chew him to bits.
Well, guess what, buddy? She’s no longer yours, so you can drop dead at your earliest convenience. Just brush the dust off your shoulders and walk away, dude. Nothing you say could ever bring your dead and buried relationship back to life. It’s done, it’s over, she won.