I know a few couples who manage to patch things up after a breakup,
my husband's parents were actually separated for a couple of years when he was a child, and then got back together. They are one of the most romantic and beautiful couples I know now, and I'm sure the 2 years apart is a part of why they appreciate their love so much more.
However, in most cases, it doesn't work. You seem to be really really involved in what your ex \ partner is going through, but what about you? what it is that you want? I mean, I'm sure the relationship had it's problem, are you willing to accept tis guy back into your life with all the problems that you had before AND a big trust issue you have now as a result?! can you see any way the two of you can make sure that the relationship goes better from now on, or (and be honest with yourself on this) is this breakup only going to happened again with double the pain in 6 months from now?
To me it seem like you need to learn to focus on yourself now, and to come to making this choice from a place of wanting to be with this specific guy and not just because the two of you shared a love a while ago. I would tell him you need time to think and I would take a couple of months to just life your life without any contact with your ex, if after a few months you are still interested then give him a call.