Little cheese: as a lady with a boyfriend who loves it when I wear lingerie, I say some of the cost is worth it. If there are no penalties for doing so, can you keep the subscription for only a month, cancel it, and get it again in 6 months or so? One only needs so much underwear/lacy things, and the more stuff you buy at once, the less likely you are to get a chance to wear all of it.
I wish I could shop online for specific-fit stuff like bras. I can generally get undies online, though plus size websites often have their own sizing schemes completely independent of the usual 6-7-8-9 which are annoying as fuck. I do have some awesome lingerie though, like this:
Like 5 different babydoll-type outfits...
ANYWAY little cheese, I think the relationship issues might receive better advice from the relationship thread, though I do think that lingerie may help you start things up again. And you definitely have to talk and be honest with him!
And May, I am jealous. Mine have been the same size since high school. If only I could gain a cup size or two, I would be slightly more happy with my body.