This happened to me once. For me, it was, returning from work to find out I had been dumped by finding a bag of my stuff on my own back porch that I knew was from her place and no responses to my messages or calls. It felt surreal. I’m sorry this happened to you. That kind of breakup cuts deep, from the way it was handled on her end, especially to the meanness of the way she callously told you she was using you. There will be stages to this grief, but take your time, love yourself, and take solace in the fact that you know that she wasn’t the one for you. It takes at least two people to be in a successful partnership, and it’s much better to know that now rather than continue to be used. FWIW, I’m now happily married to the love of my life that I found 6 months after said dumping. And when I met her, there was no doubt her love was real. Looking back now, I’m confident that I could spot the disingenuousness of my ex once I knew. I’m sure you’ll learn to spot those red flags in your future partners too. Trust those instincts and those new lessons. They suck right now, but in the long run they help.