Remove things that remind you of her and go to the gym…Force yourself..it will do wonders for your body and mind….Will she love the person moping around or someone who is rocking a kick ass life…transform your life into something positive and your body is one way to do that..it improves you physically as well as mental clarity..in time you will get over her…I too have been there, to have no energy, where every song puts me into tears…but force yourself…do it day by day…spend for yourself…get a trainer or instructor for a month to force you to go to the gym because you paid for it and it may go to waste…Find that little anger within you that she left you and let it out at the gym…You will start healing…and no contact or knowing what she is doing..it is her life..her choice…each of you made mistakes in the relationship and it takes maturity to make it work…you are still young, the time will soon come when you literally will feel that the world is your oyster and you can do anything…Good luck and keep pushing yourself…

My two cents based on experience…i feel your pain man…i have been to a similar situation before…it may not feel like it but it is the greatest thing that happened in your life.move out…you dont need the constant reminder of the pain you are going through.the relationship may be broken but you are not.dont keep taking scraps from her and focus this time on yourself.force yourself to move.practice no contact and do this for yourself.live your life for yourself because you have neglected who you are in the relationship.this is a moment of growth if you love yourself.you will not yet see it now but it will get better.the pain is temporary.in time with no contact she will be the one wondering what you are doing.would she find you attractive moping around or would she find you attractive when you hit the gym, eat healthy, sleep well and rocking a kick ass life…do this for yourself and not for her….good luck man…i was able to move on when i too thought that my high school sweetheart was the one.the pain will pass and you will see some glimpse of light at the end of the tunnel.but it will take time…esp of no contact and moving out will keep you away from the memories that will set you back in your healing….you can do it…