relationship suicide

I was listening to my favorite band the script today, and I realized the difference between my relationships and the one they sing about is that I did this to myself. I am singing the song but I am also the one leaving. I don't know what to do it hurts to break your own heart but sometimes your emotions become involuntary and can cause a lot of damage. He wasn't good for me, he loved me but he didn't respect me. It would have never worked out. Maybe if I keep telling myself this over and over again I will believe it. I heard that you just have to wait out this pain, and eventually it will go away. What if I never find anyone better than him what if everyone is worse. what will i do.