I can't say either way, sorry. But the possibility exists that it's more/other than ADD. Maybe it's a personality disorder? You could read up on them and see if anything resonates.

Truthfully, though, you DO have a lot to deal with in your own life. I can't help but wonder why you continue to engage when you seem to get little positive interaction from this person in return. And why you're so vested in their life. Is it possibly acting as a distraction to not dealing with your own stuff?