Should I give back her gifts?

Everytime I see the things my ex-girlfriend gave me, the pain keeps coming back. I hate how I remember her in every little thing. I was thinking about sending her gifts back to her. Its going to be quite a number but if its the right thing, then so be it. I dont know if this is the right thing to do, though.

Aside from the things she gave me, I still have some of her things too. She left it here during those times that she visited. Should I send her gifts back with her stuff? If I should, does anyone know how much the shipping fee is for US to Costa Rica? Shes in Costa Rica, the place where we originally met through some latin dating singles tours. It just hurts seeing these memorabilias of her.