I'm sorry to hear about your breakup. I got dumped too and am going through depression. it's gonna be hard and you will fixate on where your life is and what she's doing at the moment without you. I have had those thoughts, all I can say is to let them run through your head until you tore out, ask all the questions you want and try to give your best answer. it's like going through withdrawal. I am clinging to a friend who will listen, that may be a good idea. Logically it makes sense that she was by right for you and has her own problems the emotional side I'm sure just wants her back or asks why couldn't she just be with me, us against the world ? all I can say is small steps, go ahead and cry, yell if you want to let it out. in those moments in between depression where u find yourself laughing or not thinking bad thoughts or crying I say hang on, and do one "normal" thing, like a short walk in the warm sun, or going and getting a cup of coffee and build up to it and from it. I'm currently fixating on the good moments of that relationship which make me even more sad... but I walked home today and that in itself got me through today. I hope this helps even a little. just build up.