I was in the same boat as Tori - our courtship had a couple of attempts and I thought 'we can work on this during the marriage', but it never ended up working and he began blaming his low libido on me for 'expecting too much' (later found out I had perfectly healthy and reasonable expectations). The marriage was bad anyway - not just the sex part - so it had to end after years of me thinking 'I have to live with my mistake and settle for what I got'.
So, according to the writer, she says that there's a physical problem and he's being a guy by not wanting to talk about it. Does he actually value the relationship as much as she does? Does he value it enough to actually WORK on it? Therapy is an option at this point. Just don't let other people tell you you HAVE to settle for less - unhappiness is worse than anything else.
(And it annoys me how the one responder is trying to shame her for wanting to enjoy a particular aspect of sex that she's always enjoyed - I found people who do that don't enjoy it themselves, so they try to shame everyone else for liking it.)