Okay here let me break this down. You don't feel as good as the other guy, obviously. When you start finding things wrong with who they've moved on with it's most definitely jealousy, what else could it be? The fact that you can't get over her causes you to find excuses and the best way for you to do is shift blame from you, which you have done, and blame the guy she has chosen over you. It's over.

D3V, you have no soul.
You clearly don't see the fact that, some people, unlike yourself, are not selfish, hateful, Obama-loving, athiest, druggy, bastards like yourself. (no offense to anyone on this website. That means everyone.)

That being said, everyone on this website is.

But, avoiding that topic, I think it started as minor Jealousy, until a real reason appeared, which he proceeded to want him dead, only because he knew that her boyfriend was scum.
Scum diserve death, but never get it.