Rather than a relationship's progression, I see this song as the musings of someone who is feeling a sort of unrequited love for a person who they are probably close to (i.e., "just friends"). When 'they make him come,' it's possible that he's masturbating to them. 'You make me complete,' of course, tells of his love for the person, and 'you make me completely miserable' shows that, yes, it is unrequited, and so it makes him miserable at the same time.
Rather than a relationship's progression, I see this song as the musings of someone who is feeling a sort of unrequited love for a person who they are probably close to (i.e., "just friends"). When 'they make him come,' it's possible that he's masturbating to them. 'You make me complete,' of course, tells of his love for the person, and 'you make me completely miserable' shows that, yes, it is unrequited, and so it makes him miserable at the same time.