I would recommend that you use the product Pro Natural Moroccan Oil Hair Treatment with Heat Protector. It is commonly known to strengthen hair that is prone to breaking and also with split ends. You should also consult your stylist for more information.
Use a better conditioner! And trimming your hair is a must. That doesn't mean you need to cut your hair, just trim half a centimeter or something. I use Pantene products and my split ends have gone away.