Not to discourage further replies, but I have in the past answered to a couple of questions relating to Aristotle´s and Alexander´s relationship:

Do we know what Aristotle thought of Alexander the Great?
What effect did Aristotle's tutoring of Alexander the Great have on him?

Short answer: we have no idea what Aristotle thought of Alexander, because Aristotle never wrote a word (at least that has survived) about Alexander. In general, the whole relationship between the two is massively glorified in later tradition; Alexander was tutored by Aristotle for couple of years at most during his teens (his education ended by the time he was 16), and the only detailed "sources" we have as to what went on in these lessons are written (by Plutarch) some 400 years after Aristotle and Alexander lived and most likely already tinted with idealised fiction. Alexander's later lifestyle and achievements are of course wholly incompatible with Aristotle's philosophy, but whether this says anything about either of them or their relationship is rather impossible to say.

Follow up question: how did the death of Alexander affect Aristotle?

Related question. Is it true that there are zero primary sources for anything in Alexander's entire life? If so, how can we be sure he even existed rather than being a popular myth or legend?