Sex question! Everyone please help?

Im a start off by bluntly saying, Im not that into sex as the average man is, which has become a problem because my girlfriend loves it, she has a higher sex drive than me. We've been dating for 9 months, If it were up to her we would have sex twice a day, but usually we have it once a month. A lot of times her sexual advances like touching, or passionate kissing I brush off because Im not in the mood. I highly doubt Im gay, because I gave it a thought but (with the utmost respect, no offense to the gay community) I threw up when I viewed a gay porn and couldnt picture myself with a man. I love women Im a romantic, and me and my girlfriend are madly in love with each other, she constantly tells me Im the best boyfriend she has had and her past were terrible and obvious that all they wanted was sex. I still find her very attractive and do feel the mood to have sex sometimes, but just not as often. I just think sex isnt that important and theres better things to be worrying about, and people shouldnt hold it on such a high pedestal, but people are saying theres something wrong with me, that I have some kind of condition, cant it just be that I'm not into sex as much as society is? Also would having sex fewer times make the times we do have sex more enjoyable? And my girlfriend said its not a big deal, that she loves me too much to let this be a problem, but she admits shes frustrated, but she doesnt want me to have sex more because shes frustrated because then it becomes a chore, I feel she says that now but in the long run it will be a problem and consequently no matter how much someone loves a person money and sex are two things that can destroy a relationship...what do you guys think?