Answer: I think it means, the person who wrote the song wishes that they could be enough for a loved one or a friend, but can't provide that friend or family's needs, so they will still be with them, and provide what they can to the person.
I think this lyric mean that the person saying this loves the other person. So much that he feels he is not good enough for her perfection, although he can not leave her side as he aches without her. Anyway whats the song :)
