(((((lggirl))))
I am sorry that you are hurting over this. It does sound like you have bee without him for quite a while so why not try letting go so you don't go crazy.
Call his parents and tell them you want to get rid of his stuff and ask them if they want to come get it for him. If they do not want it throw it out or donate it.
I suspect that you have not heard the last from this guy it is very difficult to get an A out of your life completely ya know. So enjoy your time now is all we have anyway.