When do you leave behind the fallen, when do you move on?

When do you move on after a tragedy? When can you say you did everything you could but it's time for me to go? I'm in a rough patch of life right now caught at an impasse and in need of guidance but for the first time no one wants to give it to me. There's an aching in my stomach and a throbbing in my head. It feels like a break up. But we're still together, I'm borderline nauseous all the time. It feels over, I don't want it to be but that's how it feels. I've now flunked out of school and I'm wondering where to go with my life I'm experiencing the same pain as when Kaela left me but it shouldn't I took her back cause I love her. I told her not to make me regret it. I'm in so much pain right now I don't even know if I can look her in the face. There's this fire burning in side me and it's burning every emotion I knew it's consuming the nice guy I am I'm learning that I'm molded so easily by matters of the heart and I'm becoming cold an lifeless. In the mirror some chiseled chin is scowling back at me for no apparent reason. I'm a new person and i don't know if she'll accept me but I know I cant go back. I may be moving on one way or another here shortly cause I don't like where this whole relationship is headed.