It seems to me that he is definitely talking about his time living the "rock star life" and sleeping around and doing drugs. He wants to give up that part of his rock and roll life and have a serious relationship. He's put his faith in this girl, but she was not up to it. "She was good at getting there , but not as much round-trip" seems like she couldn't commit all the way, also "Last Night I had a dream, it was great" seems to imply that his faith and love are not as valid in the real world as they are in his dreams. But ultimately it's a hopeful song. He still has faith in her, regardless of the status of their relationship. It's pretty sweet as far as "disillusioned love" songs go.
It seems to me that he is definitely talking about his time living the "rock star life" and sleeping around and doing drugs. He wants to give up that part of his rock and roll life and have a serious relationship. He's put his faith in this girl, but she was not up to it. "She was good at getting there , but not as much round-trip" seems like she couldn't commit all the way, also "Last Night I had a dream, it was great" seems to imply that his faith and love are not as valid in the real world as they are in his dreams. But ultimately it's a hopeful song. He still has faith in her, regardless of the status of their relationship. It's pretty sweet as far as "disillusioned love" songs go.