(((((Treese))))) The thing that is getting you is that your view of what he does is totally different than his!
In his mind, he is single. (Never mind the facts.) And the iPod is "just" an iPod. He isn't doing these thing to hurt you, you don't have anything to do with it! So, he pulls out his iPod. He is thinking, "I'll listen to some music." You are thinking, "How can he hurt me like that?" Right now, it is your reaction to what he is doing that is hurting you. That's what you are going to learn to control! And I think you have been getting better at that. Yesterday was hard, you haven't spent that much time with him in the past month, all together! It isn't surprising at all that it was hard, and got harder as the day went on! This stuff is why I think it was good for you that he left the house, it will really help you get yourself back on level ground, then you will be ready for things to get better.
