Quote: And last night he said that I'm not special and that he's not going to change for me.
This is CLASSIC addict behavior on his part. He doesn't want to admit he has a problem, so he blames you for it. Your boyfriend's behavior is abusive and it is hurting you, and ultimately IT WILL HURT YOUR CHILD, too. Like you said, you feel like you might be going insane. I have been there, too. It's gotten to the point where he feels he can treat you like he is - and, frankly, that is something you CAN control: your reactions. It's time to stop feeling badly about yourself. You've done nothing to bring this on.
Unfortunately, you cannot change his behavior - but you can change yours. I finally gave my husband an ultimatum: porn or me. And I was serious (that's the important part - you have to be willing to follow through). So he quit, and we threw out all the porn.
There is a lot of info online about porn addiction. Just go to Google and do some searching. It is a real problem and it is killing lots of relationships. I'm so sorry this is happening to you.