What should i do with my trinkets from my ex-gf?

So its been a little over 3 months now and me and my gf broke up, the chances of us getting back together are slim to none. I have cards, shirts, etc from her still and whenever i see it, it makes me want her back, But since i know this isnt possible What should i do with it. Then again would she be mad if we got back together again and then she figures out i threw out the stuff, What should i do?!?