Othello blog #3

In tonights reading I started to think that Iago is slighty crazy, and I dont understand how if he has nothing good to say about his wife, why is he with her? Also why would he randomly think that she cheated on him with Othello, if Othello is a honast person? If Othello is a very trusting person, why would he not believe his wife if she said she didn't cheat? I started to wonder, why Iago didn't get the promotion that Cassio did. I think maybe it's because Othello knows how crazy Iago is, and he doesn't want that.