Need to Vent this out..

So, I've recently broken up with my ex. Not even the proper way. It was pretty rough..at the beginning of the fall of our relationship.. he started to make up things like he's sick, like he cannot, like he is outside but I'VE seen him online, the whole time and he never texted me through that meantime he was online, sometimes he even seen my messages and completely ignored them. That's when I knew it was maybe the end of all the nice we both had experienced...I feel so horrible, he made me feel like I was the worst person ever like I was someone who was the fault for everything. I TRIED so hard to make things right in this relationship, I tried anything, I kept messaging him, asking him how he was and if the sickness went away like we used to talk 24/7 like we used to video and voice call all the time. NOTHING, he ignored my effort and that's when I realized HE replaced me with someone else. I deleted the app we've been texting on, we didn't even speak after all that. Recently I downloaded the app again and saw that he never texted back anyway. It hurt so bad, it was as if he stabbed me so many times in my chest and heart. AND YET SILL I can't get over this, and it left scars on my heart, I will never forget this relationship I had and I won't be the same, It isn't the world that ruined me but humanity. I am so finished with everything, EVERYTHING.