I'm also confused, but you already kind of have an answer.

He's been really close to you for years, you were a couple for a short time, then he broke up with you and now he has another girlfriend and you barely speak? Is that what's happening?
What makes you believe that he isn't talking to you because he's going through a hard time? Are you sure you're not making excuses for him? I see you're the one having a hard time here.