He's not my boyfriend according to yahoo..we've been in a serious relationship for over a year. advice?

we've been together in a serious relationship for over a year and he tells me loves me and he's really caring when we're together in person. he also has an account on yahoo answers, and from time to time, i look and see what he's answered, it's just interesting to see his point of view on a problem in a way i wouldn't have expected him to answer. just now i looked at his recent answers and he acts like he's single. he answered a question about sex saying "well all the girls i've had sex with so far...", we lost our virginity together a few months ago and we haven't broken up since. this would have to mean he's cheated on me if this is legitamate. and in a question about when to have sex he used the phrase "my girlfriend of the time" which was in reference to me and quite clearly, we haven't broken up. he ended the comment about different types of sex in a winking face. on the question about losing virginity that he answered, he told the girl he lost his a few months after turning 15. he didn't have sex with me until almost a year after that. he's rated women on questions and generally just acts as if he's single on here. if i asked him in person he'd probably say it was for the sake of giving advice. he's a guy who really strongly believes that cheating is the worst thing you can do in a relationship yet he's acting like this. i don't know if he thinks it's because it doesn't count in his mind or...? i don't know what to do or if i should even confront him about this but he's acting like a hypocrite. if i mention this to him he'll get annoyed at me for "stalking" him and call me crazy. what the h*** do i do??