Most Helpful Guy
Staying friends after a breakup is like keeping a pet after it dies. It might work, but everybody knows things aren't the same anymore. I think he sill has feelings for you (negative, or positive ones), for which he tries to avoid you as much as he can - it's easier to forget you that way. But why he keeps your things is truly beyond my understanding and it doesn't tie in any way with trying to forget you. Maybe someone else could retrieve your items, if he refuses to meet you?
Most Helpful Girl
Why not? exes don't usually talk to each other in most cases, there's really nothing you can do if he is ignoring you