God can I relate to that knot feeling. Try knowing for sure that she left me for another guy. I had that feeling for a good two months before it started getting less and less painful. It's been almost 2 months NC for me and I am already getting a lot better. Probably because I have been meeting a lot of new people lately and keeping busy with things. You should do the same. If you have to, delete your Myspace account or find some way to restrict yourself from ever going to his profile again (if that's even possible). I won't lie, you're going to feel that knot for a while. But if you don't really start this NC process, the knot feeling is going to be at full strength. As soon as you let NC start though, the knot progressively gets less and less painful over time. But it's very gradual unfortunately.