No Sex Drive

Ugh, this is horribly embarrassing and I've put it off as long as I can, but I need to know if anyone knows anything on the topic or has experienced it themselves.

Pretty much everyone I've talked to (online or in person) who has lost weight tells me that their libido rocketed through the roof when they dropped the weight. Whether it's confidence or hormones (everyone seems to have an explanation), I've seen over and over that it's actually a great reason to lose weight.

But in my case, the effect is the exact opposite. Even when I was at my highest weight, I had a ridiculously high sex drive. My boyfriend (we've been together nine years, since before I even gained any weight) literally wasn't able to keep up. But as soon as I started losing a significant amount of weight (probably after the first 20 pounds or so), it disappeared completely. I never want it. I'm embarrassed and turned off when he touches me (even for a hug). I have no idea why.

It's becoming a major point of contention for us, not something we'll usually say outright, but one of those things that tends to rear its ugly head during a fight or argument (which are happening with increasing frequency). Honestly, I have never been at all a sexual sort of person; it's always been alien to me, but I'm happy to do things in that category in the context of a loving relationship. And my boyfriend understands that, but the change in my ability to get to that point is a problem.

Has anyone else had this sort of effect with their own weight loss? I know some people might suggest therapy, but due to financial difficulties, that is out of the question right now (until at least late August). It would still help me immensely to get any insight into the issue though. If any additional information would help, let me know and I'll be happy to provide any. Thanks in advance.