<human>: I have been dating my first and only girlfriend for about a year and a half. We were best friends for about 8 years before we started dating and I deeply love her. I knew going in that she likely wouldn't be a very sexual person, having never dated or displayed any inclination. I accepted this for over a year, and understood why it would take sometime for her to get used to the idea of sex. I did that even though I have a very high libio because I love and care about her. In the 1.5 years, we have had oral once and maybe 5 hand jobs. She doesn't seem interested in any sort of other physical contact and just wants to cuddle (which I do enjoy) for 3 to 5 hours at a time. 

A few months ago, I decided the point needed to be brought up and explained much of what I've said in much nicer terms. This is where it got bad. When I said that sex was an important part of any relationship, and she said that she didn't think it was necessary to a relationship. She also admitted she had had almost no recognizable sexual urges and had never masturbated or the like. This obviously concerned me greatly. When I suggested taking birth control since she was 12 to control her periods might have something to do with it and that it might be a good idea to try switch the brands, I got a very noncommittal response. 

At this point, I'm out of ideas. Nothing's changed and if anything she's gotten even more sexually distant. I do love her and don't want to leave her, so I am trying as hard as I can. 

So here's my question: what should I do? How can I explain why sex is not necessarily unnecessary and that it can be a good thing? 

Thanks for any ideas and I'll be happy to elaborate on any point.

Can you give me a shortened version of the text?
<bot>: Girlfriend (F20) has no interest in or understanding of the role of sex/physical interaction in a relationship.