I think it was Maya Angelou who said when a person tells you who they are, believe them. He has clearly told you he is not going to get attached and will not fight for you. If you're waiting for him to change, or think that loving him enough will love him out of his past hurt, I'm here to tell you that won't happen.

I'm sorry to project onto you, but I just ended something with a man who told me all along who he was, and I ignored it thinking he needed more time or that he was just hurt from his previous relationship. The problem is that all of his previous relationships were bad. If I ask him, he had no responsibility in any of them: this one emotionally abused him and was an addict, this one cheated on him, this one left him after 4 years with no explanation and convinced their entire friend group he is crazy with her lies... I opened myself up completely to him and allowed myself to be ripped apart by this guy, and when I look back, yes, he told me all along who he was.

Think very carefully what you are and are not willing to put up with, because he is not emotionally available.