Ill answer yours if you answer this about my ex.?

ok so here the deal. i gave my ex girl friend another chance but it didnt work out and we split again. she thinks she can have me anytime she wants (even when i had another girl she still tryed). i really dont want her anymore and want her to get it into her head that im done with her. she gave me this teddy fing that she got me for V-day (how sweet) and have had it for years now. so im planing on posting it back to her (she lives a bit away) hoping that she will get the message that WERE OVER. do you fink that would work.. i dont want to hurt her just wanting her to get the hint.