Complex sentence: Ben reminds him of the last time he thought with his heart instead of his gun, which Sayid replies thats what he used to recruit him, which Ben then asks if he wants to save his friends or not.
Split into simpler sentences: Ben reminds him of the last time he thought with his heart instead of his gun, to which Sayid replies that that's what Ben used to recruit him. Ben retorts by asking if he wants to save his friends or not.